Category Archives: Flow Meters

A flow meter (or flow sensor) is an instrument used to measure linear, nonlinear,

mass or volumetric flow rate of a liquid or a gas.

When choosing flow meters,

one should consider such intangible factors as familiarity of plant personnel,

their experience with calibration and maintenance, spare parts availability,

and mean time between failure history, etc., at the particular plant site.

It is also recommended that the cost of the installation be computed,

only after taking these steps

The different sensors include dial, in-line, ultrasonic, orifice plate,

totalizing meters, variable area, venturi, or with switch output.

The different designs of the flow meters have a variety of applications.

What is a Flow Meter and how does it work?

Flowmeter types

Flow Metering Principals

Differential Pressure Flowmeters
Velocity Flowmeters
Positive Displacement Flowmeters
Mass Flowmeters
For Open Channel Flowmeters – weirs, flumes, submerged orifices, current meters, acoustic flow meters and more

For different working principle, We offer different types of flow meters, like:

Differential Pressure Flow Meters

Orifice Plate

Venturi Tube

Flow Nozzles

The Sonic Nozzle – Critical (Choked) Flow Nozzle
Calorimetric Flowmeter
Ultrasonic Doppler Flowmeter
Positive Displacement Flowmeter

Variable Area Flowmeter or Rotameter

Velocity Flowmeters

Pitot Tubes

Electromagnetic Flowmeter

Turbine Flowmeter

Vortex Flow Meter

Thermal Flowmeter

Coriolis Flowmeter

Mass Flowmeters

Open Channel Flowmeters

How to choose your flowmeters?

Important factors when selecting flow metering devices are

accuracy
cost
legal constraints
flow rate range
head loss
operating requirements
maintenance
lifetime

These factors are more or less related to each other. Example – the cost of flow meters increases with accuracy and lifetime quality.

Sino-Instrument offers over 50 flow meter for level measurement.

About 50% of these are differential pressure flow meters,

40% is the liquid flow sensor,

and 20% are Ultrasonic Level Transmitter and mass flow meter.

A wide variety of flow meters options are available to you,

such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of flow measurement instrumentation,

located in China.

Choose the right Flow Meters for your application:

Clamp-on Ultrasonic Gas Flow Meter

Posted on September 9, 2019 by KimGuo11

Clamp-on Ultrasonic gas flow meters, also called ultrasonic natural gas flow meters, measure liquids, and gas in industrial flow measurement applications.

Ultrasonic gas flow meters are one of the most reliable solutions,

for challenging gas flow measurement applications. (Kind like the portable ultrasonic)

Because the sensor is clamped on to the outside of the pipe,

it is immune to the process compatibility,

concerns of an in-line flow metering technology (What is a flow meter? ).

It is now possible to measure natural gas, steam, compressed air, hydrogen,

compressed air and many more using clamp-on flow meters.

Our transducer technology is also ideal for shale gas,

and coal seam gas wellhead applications.

SI-3128 wall mounted ultrasonic flow meter could be applied to a variety of liquid applications,

including ultra-pure liquids, water, chemicals, raw sewage,

reclaimed water, cooling water, river water, plant effluent, alcohol, beer, etc.

What are the types of flow meter?

Features of Clamp-on Ultrasonic Gas Flow Meter

Accuracy: 1%
Ingress protection level: IP67 (transmitter), IP68 (sensor)
Wide measurement range, pipe size from DN15mm to DN6000mm.
Three installation types: wall mounting, DIN-rail mounting, explosion-proof box mounting
Could operate with temperature sensors for heat/energy measurement.
Could be installed without shut down equipment operation

Specifications for Clamp-on Ultrasonic Gas Flow Meter

Items	Performance & Parameter
Host	Principle	Transit- time ultrasonic flowmeter
	Accuracy	±1%
	Display	2X20 character LCD with backlight, support the language of Chinese, English and Italy
	Signal Output	1 way 4~20mA output, electric resistance 0~ 1K, accuracy 0. 1%(optional) 1 way OCT pulse output(Pulse width 6~1000ms, default is 200ms) 1 way Relay output
	Signal Input	3 way 4~20mA input, accuracy 0. 1%, acquisition signal such as temperature, press and liquid level
		Connect the temperature transducer Pt100, can finish the heat/energy measurement
	Data Interface	Insulate Rs485 serial interface, upgrade the flowmeter software by computer, support the MODBUS
Special Cable	Twisted-pair cable, generally, the length under 50 meters ; Select the RS485, transmission distance can over 1000m
Pipe Installation Condition	Pipe Material		Steel, Stainless steel, Cast iron, Copper, Cement pipe, PVC, Aluminum, Glass steel product, liner is allowed
	Pipe Diameter		DN32~6000mm
	Straight Pipe		Transducer installation should be satisfied: upstream10D, downstream 5D, 30D from the pump
Measuring Medium	Medium		water,sea water ,alcohol,Acid and alkali,waste water,beer,all kinds of oil Single liquid can transmit sound wave.
	Temperature		-30~160℃
	Turbidity		No more than 10000ppm and less bubble
	Flowrate		0~±7m/s,Forward and backward measurement
Work environment	Protection grade		Host:IP67;flow sensor:IP68
	temperature		Host:-20~60℃;flow sensor:-30~ 160℃
	Humidity		Host: 85%RH; Flow sensor:can measure under water, water depth^2m (tansducer sealed glue)
Power Supply	DC8~36V or AC85~264V
Power Consumption	1.5W
Dimension	13215085mm(host)

You may like: Vortex shedding flow meter

Gases that can be measured with ultrasonic clamp-on flowmeters include:

Compressed Air	Hydrogen	Oxygen
Nitrogen	Steam	Natural Gas
Propane	Butane	Corrosive Gases
Erosive Gases	High Purity Gases	Sterile Gases
Toxic Gases	Inert Gases	Compressed Air

What is ultrasonic gas meter?

Ultrasonic flowmeters use sound waves to determine the velocity of a fluid flowing in a pipe.

At no flow conditions,

the frequencies of an ultrasonic wave transmitted into a pipe,

and its reflections from the fluid are the same.

Under flowing conditions, the frequency of the reflected wave is different due to the Doppler effect.

When the fluid moves faster, the frequency shift increases linearly.

The transmitter processes signals from the transmitted wave,

and its reflections to determine the flow rate.

Transit time ultrasonic flowmeters send and receive ultrasonic waves,

between transducers in both the upstream and downstream directions in the pipe.

At no flow conditions,

it takes the same time to travel upstream and downstream between the transducers.

Under flowing conditions, the upstream wave will travel slower and take more time than the (faster) downstream wave.

When the fluid moves faster, the difference between the upstream and downstream times increases.

The transmitter processes upstream and downstream times to determine the flow rate.

They represent about 12% of all flowmeters sold.

The ultrasonic principle can also be used to measure water depth. Please refer to Portable Ultrasonic Water Depth Gauge for water depth measurement.

You may like: Nitrogen flow meter

How does a clamp-on flow meter work?

A clamp-on ultrasonic gas flow meter produces signals,

that is five to ten times more powerful,

then those of traditional ultrasonic transducers.

The new clamp-on transducers produce clean, coded signals with very minimal background noise.

The result is that a clamp-on gas flow meter can now provide optimum performance,

even with low-density gas applications.

Today, our ultrasonic clamp-on gas flowmeters such as the SI-3128 can measure the flow of any gas,

and then calculate mass flow using a pressure transmitter connected to the analog input.

Inline ultrasonic flowmeters

The SI-3000H Portable Ultrasonic Flowmeter is a widely used time difference ultrasonic flowmeter,

for on-line calibration and inspection of liquid flow in various industrial sites.

Handheld ultrasonic flow meter, also known as Portable Doppler flow meter, or Inline ultrasonic flow meter.

SI-2000H handheld ultrasonic flow meter is a representative of portable ultrasonic flow meters.

More Gas Flow Meters

Sino-Instrument offers 20 Gas flow meter products, with Best Price.

About 13% of these are Petroleum& Chemical flow meters, 4% are water treatment flow indicators.

The best Reference price is USD 2000-7000.

A wide variety of gas flow meter options are available to you, such as free samples, paid samples.

Sino-Instrument is clamp-on ultrasonic flow meter suppliers, located in China.

clamp-on ultrasonic flow meter products are most popular in North America, Mid East, and Eastern Europe.

The United States, and India, which export 99%, 1%, and 1% of ultrasonic level transmitter respectively.

You can ensure product safety by selecting from a certified supplier,

with ISO9001, ISO14001 certification.

Of course, you can also choose other gas flow measurement instruments, like:

https://www.drurylandetheatre.com/coriolis-mass-flow-meter-si3131/

Insertion Magnetic Flow Meter

Insertion Vortex Flow Meter

https://www.drurylandetheatre.com/steam-flow-meter-inline-vortex-flow-meters/

https://www.drurylandetheatre.com/magnetic-flow-meters/

https://www.drurylandetheatre.com/si-rsl-thermal-mass-flowmeters/

Request a Quote

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

Turbine Flow Meters

Posted on August 22, 2019 by KimGuo11

Turbine Flow Meters for Liquid

Turbine flow meters are flow sensors work for the inline liquids.

Turbine flow meters are cost-effective and offer reliable,

measurement with minimal flow meter maintenance required.

Turbine flow meters measure the velocity of liquids, gases, and vapors in pipes,

such as hydrocarbons, chemicals, water, cryogenic liquids, air, and industrial gases.

Types of flow meter

Featured Turbine Flow Meters

Gas Turbine Flow Meters

Gas Turbine Flow Meter

Liquid Turbine Flow Meters

Liquid Turbine Flow Meter

Insertion Turbine Flow Meters

https://www.drurylandetheatre.com/insertion-turbine-flow-meter/

Sanitary flow meter

Turbine Sanitary flow meter

Turbine Flow Meter Working Principle

Turbine meters are simple to operate and maintain,

and in-service worldwide as a reliable, cost-effective method,

for achieving accurate flow measurement.

Turbine flow meters are designed to maximize throughput,

and minimize pressure drop, maintain high flow rates over an extended flow range,

and offer pulse output that is linear to the flow rate.

The turbine meters also minimize fiscal measurement uncertainty,

by delivering high-frequency pulse resolution,

to account for minute increments of the flow rate.

Turbine flow meters use the mechanical energy of the fluid to rotate a “pinwheel” (rotor) in the flow stream.

Blades on the rotor are angled to transform energy,

from the flow stream into rotational energy.

The rotor shaft spins on bearings.

When the fluid moves faster, the rotor spins proportionally faster.

Turbine flow meters now constitute 7% of the world market.

Shaft rotation can be sensed mechanically or by detecting the movement of the blades.

Blade movement is often detected magnetically,

with each blade or embedded piece of metal generating a pulse.

Turbine flowmeter sensors are typically located external to the flowing stream,

to avoid material of construction constraints that would result,

if wetted sensors were used.

When the fluid moves faster, more pulses are generated.

The transmitter processes the pulse signal to determine the flow of the fluid.

Transmitters and sensing systems are available to sense flow,

in both the forward and reverse flow directions.

Turbine flow meter equation

The relationship between volumetric flow rate of the turbine flowmeter and the frequency of the pulses generated by the pickup sensor can be expressed in the form of the equation:

f = kQ

Where,
f = Frequency of pulses generated by pickup sensor(Hz, equivalent to pulses per second)
Q = Volumetric flow rate (e.g. litres/min)
k = “K” factor of the turbine meter (e.g. pulses per litre)

Turbine Meter K-Factor

The turbine meter measures volumetric flow, however the pulses produced vary depending on the meter. The variation is accounted for by a K-factor. The K-factor is the number of pulses per unit volume. It is primarily determined by the size and type of the turbine meter. Due to manufacturing tolerances, the actual K-factor can vary between similar models. The K-factor is applicable only to the fluid for which the meter was calibrated in the factory.

Turbine flow meter advantages and disadvantages

Advantages of Turbine Flow Meters

High precision, generally up to ± 1% R, ± 0.5% R.
Output pulse frequency signal, suitable for total metering and connection with a computer, no zero drift, strong anti-interference ability.
Compact and lightweight, easy installation and maintenance, and large-circulation capacity.
Good repeatability, short-term repeatability of 0.05 ~ 0.2%, due to good repeatability, frequent calibration or online calibration can get very high precision.
A special type of sensor can be designed according to user needs, such as low-temperature type, two-way, downhole type, mixed sand special type.
Pressure compensation can be performed under the pressure state in which the gas to be measured is stable.
The turndown is wide, medium and large caliber up to 1:20, small-caliber is 1:10.

Disadvantages of Turbine Flow Meters

Need to be calibrated regularly, there is no way to maintain accuracy for a long time, can not work continuously for a long time.
The cleaning requirements of the medium are high, but the filter can be installed.
The flowmeter has a large influence on the flow velocity distribution (flow regulator can be installed).
It is not suitable for places where the flow rate is drastically changing.
Not suitable for testing of corrosive media.

Application Industries

Oil & Gas
- Water injection
- Test and production separators
- Disposal wells
- Hydraulic fracturing
- Chemical injection
- Natural gas pipelines
Aerospace/Defense
- Engine Testing
- Fuel flow measurement
- Shipboard reverse osmosis systems
- Monitor fuel supply to ship engines
Pharma-Bio Tech, Food & Beverage
- Sanitary measurement
- Pill coating
Power Generation
- Custody transfer
Industrial & Municipal
- Building automation
- HVAC
- Water metering
Cryogenics
- Liquids measurement for plant applications and truck deliveries

Turbine Flow Meters Price

Sino-Instrument offers all kinds of Turbine flow meters, made in China. Best Quality, and Best Price!

The price of Turbine Flow Meter is around USD400-700/pc,

which will be affected by:

Fluid Type
Viscosity
Connection
Pipe Sizing
Process Temperature (min & max)
Flow Range (min & max)
Pressure Range (min & max)
Accuracy Range
Specific Application

All Flow Meters can work with the NEW AMS TREX, HERE!

Sino-Instrument, Manufacturer for turbine flow meters,

like: gas turbine flow meter,

liquid turbine flow meter, sanitary turbine flow meter,

insertion turbine flow meter, steam turbine flow meter,

and natural gas turbine flow meter.

Sino-Instrument’s turbine flow meters, made in China,

Having good Quality, With better price.

Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Request a Quote

KimGuo11

drurylandetheatre.com

Coriolis Flow Meter

Posted on August 12, 2019 by KimGuo11

Coriolis flow meter is also called Coriolis mass flow meter. Based on the principles of Micro motion mechanics. Coriolis meters provide extremely accurate mass or volume flow, density and temperature measurement.

A Coriolis flow meter is a type of mass flow meter. It is designed differently and works differently than thermal or differential mass flow meters. Coriolis meters provide extremely accurate mass or volume flow, density and temperature measurement with few moving parts and no straight pipe requirements.

Sino-Inst offers a variety of Mass Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.

Request a Quote

Mass Flow Meters

Guess You’ll Like:

Coriolis flow meter diagram

How does a Coriolis flow meter work?

Where is Coriolis flow meter used?

Coriolis flow meter installation

Coriolis flow meter price

Features of Coriolis Flow Meter

Directly measure the mass flow of fluid in the pipeline
- The measurement accuracy is high and the repeatability is good. It can directly measure the fluid mass flow in a large range
High measurement accuracy
- The mass flow measurement accuracy of this flowmeter is 0.2 level
Stable and reliable work
- There are no obstacles and moving parts in the fluid measuring tube, so it has high reliability and long life.
Adapted fluid medium surface width
- In addition to uniform fluids with general viscosity, it can also measure high-viscosity fluids (honey, oil slurry, etc.).
- It can measure not only the fluid parameters of a single solution, but also multiphase flow.
- Whether the medium is laminar or turbulent, it does not affect its measurement accuracy.
Wide application environment
- It is suitable for petrochemical, chemical, metallurgical, pharmaceutical, paper, food, energy and environmental protection industries.
- In the process of inspection and control and custody transfer measurement and other occasions.
- Has been widely used,
Multiple real-time online measurement and control functions
- In addition to mass flow, the density and temperature of the fluid can also be directly measured.
- The intelligent flow transmitter can provide a variety of parameter display and control functions. It is a multi-function flow measurement and control instrument.
Good scalability
- The company can design and manufacture mass flow meters with special specifications and special functions according to user needs.
- It can also perform remote monitoring operations.

Specifications of Coriolis Flow Meter

Measured medium	Liquid, gas
Measuring diameter	1mm~300mm
Measurement items	Mass flow, density, temperature, volume flow, concentration
Density measurement range	0.2g/cm3~2.5g/cm3
Medium temperature	-200℃～+300℃
Flow measurement error	Liquid 0.2%R+Cz, 0.15%R+Cz, gas 0.5%R+Cz, 1.0%R+Cz,
Density measurement error	0.002g/cm3
Temperature measurement error	≤1℃
Signal form	4～20mA, O~2kHZ, RS485, Hart
Power supply	24VDC
Measuring tube material	304, 316, can also be negotiated and provided according to user requirements
Explosion-proof grade	Exd(ib)IICT2~T5, ExdIICT4
Enclosure rating	IP67
Flange standard	National standard GB/T series standards can also be processed according to user requirements.
Instrument output form	a. Current output: 4-20mA; power supply: 13-28VDC, three-wire system; b. Pulse output: 0～2KHZ; power supply: 13-28VDC; optocoupler output>3mA; c, RS485 interface d, HART communication;
Instrument wiring	a. The electrical connection port specification of the flowmeter signal output line is: M20 × 1.5; it can also be customized according to user requirements. b. The 4-20mA current output is a three-wire system; c. The pulse output is a three-wire system.

Structure of Coriolis Flow Meter

Coriolis mass flowmeter consists of two parts: flow sensor and converter (or flow computer).

The following figure shows an example of a flow sensor, which mainly consists of a measuring tube 2 and its supporting tube 1, a driving coil 4 in the measuring tube vibration excitation system, an electromagnetic detection probe 3 and 6 for detecting the deflection of the measuring tube, and a correction measuring tube material Yang Yang The temperature measurement components and other components affected by the modulus temperature.

U-tube sensor structure diagram
1 Support tube
2 Measuring tube
3 and 6 Magnetic detection probe
4 Drive coil
5 shell

The converter is mainly composed of the vibration signal generation unit, signal detection and signal processing unit of the vibration excitation system; the flow computer also has the functions of configuration setting, engineering unit conversion, signal display and communication with the host computer.

Extended reading: U-series Liquid Mass Flow Meter | Liquid-slurry flow measure

How Does a Coriolis Flow Meter Work?

As shown in the figure, when a mass point with a mass of m moves at a speed υ in a pipe rotating at an angular velocity ω on the p axis, the mass point is subjected to the acceleration and force of two components.

a. Normal acceleration is the centripetal force acceleration αr, its magnitude is equal to ω2r, and the direction is toward the P axis;
b. Tangential acceleration αt is Coriolis acceleration, its magnitude is equal to 2ωυ, and the direction is perpendicular to αr.
Due to the compound motion, Coriolis Fc=2ωυm acts in the αt direction of the particle, and the pipe acts on the particle with a reverse force -Fc= -2ωυm.

When a fluid with a density of ρ flows at a constant speed υ in a rotating pipe, any pipe with a length of Δx will experience a tangential Coriolis force of ΔFc.

(1)

In the formula, A-the internal cross-sectional area of the pipeline. Since the mass flow rate is δm, δm=ρυA.
And so

(2)

Therefore, the mass flow can be measured by directly or indirectly measuring the Coriolis force generated by the fluid flowing in the rotating pipe. This is the basic principle of the Coriolis mass flowmeter.

However, it is difficult to generate Coriolis force by rotating motion. The current products are all replaced by pipe vibration, which is a thin-walled measuring tube fixed by two broken ends. At the midpoint, it is excited at or near the resonance of the measuring tube. The fluid flowing in the tube generates Coriolis force, which causes the two halves of the measuring tube to be deflected in opposite directions. Electromagnetic method is used to detect the amount of deflection to obtain the mass flow rate.

The fluid density will affect the vibration frequency of the measuring tube. The density has a fixed relationship with frequency. Therefore, mass flow meters can also measure fluid density.

OMEGA Engineering has a great explanation video about Coriolis Flow Measuring Principle. Let’s take a look together.

Video source: https://www.youtube.com/watch?v=2vjQ1GwAviM&feature=emb_logo

Applications of Coriolis mass flow meter

Coriolis Flow Meter can play a very effective role in the batching and batch measurement of various feeds in the following fields. The measurement and control of material flow in the process. The rapid and changeable density measurement. As well as product quality monitoring and other aspects.

Coriolis Flow Meter is mainly used to measure the mass flow and total volume and density of the medium. At the same time, it can also measure the volume flow and total volume, the temperature of the medium, the water content, the alcohol content of alcohol, and the concentration of two liquids that are more uniformly mixed. , The ratio of raw materials in the process flow, etc.

Applications of Coriolis mass flow meter

It is mainly applicable to the following industries:
(1) Petroleum industry, such as crude oil production measurement, water cut, single well production measurement, crude oil transportation measurement
(2) Chemical industry
(3) Food industry
(4) Pharmaceutical manufacturing industry, such as liquid medicine production and measurement
(5) Papermaking industry, such as pulp metering
(6) Textile printing and dyeing industry
(7) Energy transmission measurement, such as liquefied gas measurement
(8) Environmental protection industry, such as sewage treatment; measuring slurry density during desulfurization

Extended reading: Featured Hydraulic Flow Meters For Sale

Advantages and Disadvantages of coriolis flow meter

Advantage

The Coriolis mass flow meter directly measures the mass flow rate with high measurement accuracy.
It can measure a wide range of fluids, including high-viscosity liquids, slurries containing solids, liquids containing trace gases, and medium and high-pressure gases with sufficient density.
The measuring tube has a small vibration amplitude and can be regarded as a non-moving part, and there are no obstructions and moving parts in the measuring pipe.
It is not sensitive to the flow velocity distribution of the upflow, so there is no requirement for upstream and downstream straight pipes.
The measured value is not sensitive to the fluid viscosity, and the change of fluid density has little effect on the measured value.
Multi-parameter measurement can be done, such as measuring density at the same time, and deriving the concentration of solute in the measurement solution from this.

Disadvantage

The instability of the zero point of the Coriolis mass flowmeter results in zero drift, which affects the further improvement of its accuracy. Many types of meters have to divide the total error into two parts, the basic error and the zero point instability measurement.
Coriolis mass flow meters cannot be used to measure low-density media and low-pressure gases; the gas content in the liquid exceeds a certain limit (varies by model), which will significantly affect the measured value.
Coriolis mass flowmeters are more sensitive to external vibration interference. In order to prevent the impact of pipeline vibration, most models of Coriolis mass flowmeters require relatively high installation and fixation of flow sensors.
It cannot be used for larger pipe diameters, and is currently limited to 150 (200) mm or less.
The inner wall of the measuring tube is worn, corroded, or deposited and scaled, which will affect the measurement accuracy, especially for the Coriolis mass flowmeter of the thin-walled tube.
The pressure loss is relatively large, which is equivalent to that of volumetric meters. Some Coriolis mass flow meters are even 100% larger than volumetric meters.
Most models of Coriolis mass flow meters are larger in weight and volume.
Expensive. The overseas price is 5,000 to 10,000 US dollars for a set, which is about 2 to 5 times that of the electromagnetic flowmeter of the same caliber; the Chinese price is about 2 to 8 times that of the electromagnetic flowmeter.

Coriolis flow meter installation

Installation Requirements for Coriolis Mass Flowmeters

When choose Flowmeter, many enterprises will choose Coriolis mass Flowmeter under reasonable cost. Under the correct installation, Coriolis mass Flowmeter can directy measure the mass and density of fluid. Only reasonable installation can ensure the accuracy and stability of mass Flowmeter.

1. Conventional of Coriolis Mass Flowmeter Installation

At least 0.6 m distance between the sensor and a large transmitter or motor. Since the sensor depends on the electromagnetic field. It is necessary to avoid installing the sensor near the large interference electromagnetic field. In addition, the installation position should be carefully selected to avoid vibration as far as possible.

2. Installation Direction

The requirements of the process and the location of the process pipeline have determined the installation direction of most sensors.While the sensor installation angle does not affect the flowmeter operation, the following recommendations should be considered to the extent possible:

(1) When measuring the liquid. The sensor housing shall be mounted downward to avoid air gathering in the flow tube;
(2) When measuring the gas. The sensor housing shall be mounted upward to avoid condensation water gathering in the flow tube;
(3) When measuring liquid slurry. The sensor shall be mounted vertically, like a flag, to avoid the accumulation of particles in the flow tube. The process medium should flow from the bottom up to avoid the jet tube.

3. Valves

In order to facilitate Flowmeter zero adjustment, the downstream sensor should be installed globe valve. To facilitate batch operation, sensors and globe valves should be as close as possible to the receiving container.

Hose should not be installed between sensor and globe valve to avoid batch error caused by expansion or compression. Also, control valves can be installed downstream to prevent vaporization or emptying of the medium.

4. Flow direction of mass flow meter installation

No matter what flow direction, the flow sensor can accurately measure the flow rate. The normal flow direction of the fluid is indicated by arrows on the general sensor.

5. Gas&liquid two-phase flow

If the process medium produces a gas-liquid two-phase flow, the sensor housing should be installed down or on a vertical pipe. This installation can effectively avoid the accumulation of gas in the medium in the flow tube.

In loading and unloading metering applications, the sensor housing should be mounted upwards or vertically. One-way valves should be installed downstream of the sensor to prevent medium reflux. One-way valves should be installed as close as possible to the sensor.

In some cases, the process medium can not be completely excluded from the pipeline. And flag installation is generally recommended.

When Coriolis mass Flowmeter is installed, the direction of installation is very important. The direction of installation is determined according to the position of the process pipeline arranged on the spot.

Reasonable installation can ensure the long-term stable work of Coriolis mass Flowmeter. Installation Requirements for Coriolis Mass Flowmeters.

Four Installation Methods of Coriolis Mass Flowmeters

I. Normal installation, medium/large Coriolis mass flowmeter

It is recommended to release and empty the gas that may be stored in the Coriolis mass Flowmeter pipeline of Shanghai Automation instrument Co., Ltd before installation.

II. Inverted installation, medium/large Coriolis mass flowmeter

It is recommended to use an inverted installation to measure gas (e.g. steam). Because only in this way, the liquid that may be stored in the Coriolis mass Flowmeter can be released and emptied.

III. Flag type installation, medium/large Coriolis mass flowmeter

Flag installation is the installation of Coriolis mass Flowmeter perpendicular to horizontal line.

Flag type mounting is recommended to measure the suspension and liquid and solid biphasic liquids.

For example, for liquids that are easy to solidify under temperature change, for liquids with high viscosity, it is necessary to empty the liquid left in the measuring pipe after measurement.

Flag mounting will not affect the measurement accuracy of any type of liquid measured. but the direction of the measurement flow must be bottom-up.

IV. Miniature Pipe Size Coriolis Instrument Installation

Sino-Inst small size Coriolis mass Flowmeter has a very small flow range and high accuracy requirements. In this way, stable mounting plates and supports are necessary. The mounting plate and Coriolis mass Flowmeter must be completely flat without any space.

If not, use horizontal bolts to adjust the balance. The small size Coriolis mass flowmeter is installed as follows:

Types of mass flow-meters

Sino-Inst offer different types of mass flow meter, like:

**Z-Series Straight Tube Micro Motion Coriolis Flow Meter**

**T-series Triangle Coriolis Mass Flowmeter**

**V-series Curved Digital Mass Flow Meter**

Coriolis flow meter price

Sino-Inst offers 20 Coriolis mass flow meter products, with Best Price.

About 13% of these are Petroleum& Chemical flow meters, 4% are water treatment flow indicators. The best Reference price is USD 2000-7000.

Extended reading: Featured Cheap flow meters for Sale

A wide variety of Coriolis mass flow meter options are available to you, such as free samples, paid samples. Sino-Instr is Coriolis mass flow meter suppliers, located in China.

Coriolis mass flow meter products are most popular in North America, Mid East, and Eastern Europe.

The United States, and India, which export 99%, 1%, and 1% of ultrasonic level transmitter respectively.

You can ensure product safety by selecting from a certified supplier, with ISO9001, ISO14001 certification.

Request a Quote

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KimGuo11

drurylandetheatre.com

Remote Magnetic Sewage Flow Meter

Posted on August 9, 2019 by KimGuo11

Sewage Flow Meter is an electromagnetic flow meter used to measure sewage/waste water. Also called Effluent flow meter, or wastewater flow meter.

Sewage Flow Meter application for water flow rate measurement, in those wastewater treatment industrial pipes. The water and sewage treatment industry plays an important role in providing high-quality water supply. In the water treatment process, no matter it is water inlet, transportation, drainage and other processes, the flow needs to be measured. Therefore, the choice of flowmeter is particularly important.

Sewage has the characteristics of large flow rate changes, impurities, high corrosiveness, and certain conductivity. Electromagnetic flowmeter has the advantages of wide range, simple structure, no moving parts, and can measure dirty and corrosive media. Therefore, in the sewage treatment industry, electromagnetic flowmeters are widely used. Here you can find the right sewage flow meter to measure the flow of wastewater for your application.

Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.

Request a Quote

Magnetic Flow Meters

Features of Remote Magnetic Sewage Flow Meter

Electromagnetic flowmeter is an instrument for measuring volumetric flow. Flow measurement is not affected by changes in fluid density, viscosity, temperature, pressure and conductivity. The sensor induced voltage signal has a linear relationship with the average flow rate, and the measurement accuracy is high.
There are no obstructions and moving parts in the measuring tube, which will not cause additional energy loss or blockage. Therefore, the energy-saving effect is significant, and it is especially suitable for the measurement of liquid-solid two-phase flow such as sewage, mud, mineral pulp, coal water slurry, paper pulp, etc.
The electromagnetic flowmeter has no mechanical inertia and is sensitive. It can measure instantaneous pulsating flow and has good linearity.
Installation requirements are low. The straight pipe section required by the sensor is relatively short, generally the first 5D and the rear 3D (D is the inner diameter of the selected instrument).
The sensor part only has the lining and the electrode in contact with the medium. As long as the electrode and the lining material are selected reasonably, it can resist corrosion and abrasion, ensuring long-term use.
When the power is off, the EEPROM can protect the set parameters and accumulated values.
The converter uses a low-power single-chip microcomputer to process data. It uses SMD electronic components and surface mount SMT technology. Reliable performance, high precision, low power consumption, and zero point stability. LCD display, display cumulative flow, instantaneous flow, flow rate, flow percentage and other parameters.
It adopts multi-electrode structure with high accuracy. Equipped with ground electrode, no grounding ring is needed, which saves cost.
The low-frequency rectangular wave excitation improves the stability of the flow. The power loss is low and the low flow rate is superior.
Two-way measurement system. It can measure forward flow and reverse flow.

Specifications of Remote Magnetic Sewage Flow Meter

Caliber	DN 10 ～ DN2000 (3/8″…80″)
Excitation method	Square wave constant current excitation
Installation form	One-piece flange, split flange
lining	Neoprene, polyurethane rubber, PTFE, F46
Electrode material	316L, Hc, Hb, titanium, tantalum, platinum iridium, tungsten carbide
Ground	Built-in ground electrode (DN25 and above)
Medium	Conductive liquid
level of accuracy	0.5, 1.0
Dielectric conductivity	＞ 5 μS/cm
Flow rate	≤ 10 m/s
Pipe connection flange	GB 81～59
Pipe connection	Flange connection
Medium temperature	Chloroprene rubber: -10℃～60℃; PTFE: -10℃～120℃ Polyurethane rubber: -10℃～80℃; F46: -10℃～150℃
preset pressure	4.0 MPa; 1.6 MPa; 1.0 MPa
Protection level	IP65; IP68
output signal	4mA ～ 20mA DC current; pulse/frequency; upper and lower limit alarm
Cable interface	M20×1.5 internal thread
Communication	RS 485 communication protocol (modbus protocol) RS 232 communication protocol (optional)
Display	Instantaneous flow, alarm display, percentage, flow rate, forward and reverse cumulative flow and total cumulative
power supply	220V AC, 24V DC, 3.6 V battery power supply
Use type	Ordinary type, waterproof type
High pressure	custom made

Read more about: Digital Water Flow Meters

Electromagnetic Flow Meter for Sewage

According to the situation of the wastewater treatment site, there are two general wastewater discharge methods. One is to discharge through pipes, and the other is to discharge through ditches. The two types of flow meters selected are therefore different.

1.Waste water is used for pipeline discharge, and most of them choose electromagnetic flowmeter to measure. Because there are no obstructions in the sensor, there is no fear of debris in the medium.

But need to pay attention to the medium must be full. If the pipe is not full, a pipe must be used to lead a section of the sinking pipe to ensure that the flowmeter is in a full pipe.

Note that the electromagnetic flowmeter cannot be installed at the drain of the pipeline, and the length of the straight pipe must meet the requirements of the flowmeter.

Extended Reading: Guide: Magnetic Flowmeter Installation

2.Wastewater is used for ditch discharge, mostly using ultrasonic open channel flow meters.

A measuring groove is installed at the discharge port, and an ultrasonic probe is installed directly above the groove. In this way, the flow of wastewater flowing through can be measured. This instrument generally uses 24V power supply, output: 4-20MA.

When selecting the electromagnetic flowmeter for waste water, it is necessary to know the temperature of the medium, the pressure of the medium, the flow range of the medium, the composition of the medium, the power supply requirements, and the on-site installation requirements. The key point of the selection is to choose which product to measure well. The second is to consider the convenience of installation, operation and maintenance. Finally, the product price can be considered.

Wastewater/Sewage Flow Meter Calibration

A flow meter’s deviation from the standard can be measured in two ways: with a master meter or by weighing mass flow.

Master meters are calibrated to peak accuracy by specified, accredited laboratories.

These labs are ones that are certified by the National Institute of Standards and Technology (NIST). Subsequently, this means that flow meters. Which are calibrated to master meter accuracy in such a lab will be backed by NIST certification and traceability.

The second method of flow meter calibration involves weighing the amount of fluid that flows through the meter, during the calibration procedure. This is typically done using a supremely accurate weigh scale, which must also be approved by NIST.

This method is often regarded as the most accurate way to measure the volume of flow.

Flow meters can also be calibrated in the field, also known as “wet” calibration.

However, this method is frequently scrutinized because it lacks the involvement of national standards.

Additionally, field calibrations are usually not an option in most applications. Because challenging an installed flowmeter with a given volume of water is just not practical.

Featured Sewage Flow Meters

Sino-Inst offer over 20 Sewage flow meters, with Best Price.

A wide variety of Sewage Flow Meters options are available to you, such as free samples, paid samples.

About 13% of these are magnetic flow meter, 14% are Insertion Magnetic Flow Meter, 25% are Venturi flow meter, 13% are Handheld ultrasonic flow meter, and others are Liquid Turbine Flow Meters.

Sino-Inst is Sewage Flow Meters suppliers, located in China. Sewage Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of ultrasonic level transmitter respectively.

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KimGuo11

drurylandetheatre.com

Insertion Magnetic Flow Meter

Posted on August 8, 2019 by KimGuo11

Insertion Magnetic Flow Meter, also called insertion electromagnetic flow meter, is an insertion type flow meter. Insertion magnetic flowmeter can be installed without stopping the flow. Suitable for large diameter DN300-3000.

Insertion Magnetic Flow Meter adopts pressure tapping and installation technology. Insertion electromagnetic flow meter is composed of insertion electromagnetic sensor and electromagnetic flow converter.

Installation can be divided into an online installation type of the cut-off valve, and water control installation type without stop valves. The Insertion Magnetic Flow Meter is suitable for measuring the volume flow of various conductive liquids in the pipeline. It can also be used to measure corrosive conductive liquids such as acid, alkali and salt.

Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.

Request a Quote

Magnetic Flow Meters

Features of Insertion Magnetic Flow Meter

Compared with the pipe segment electromagnetic flowmeter, the advantages of Insertion Magnetic Flow Meter:

No need to cut off the water, cut off the pipeline, install directly on the old pipeline;
Easy to disassemble during maintenance;
Especially suitable for large-diameter pipelines, with high cost performance;
The accuracy is lower than the flange type, and it is mostly used for process control rather than measurement;
It can be made into one-piece or component pose;
The Insertion electromagnetic structure can be easily installed and disassembled without stopping the water under low pressure or under pressure. Therefore, it is very suitable for the fluid measurement of existing pipelines and facilitates the maintenance and repair of instruments.
The measurement accuracy is not affected by changes in physical parameters such as the temperature, pressure, density, viscosity, conductivity (as long as the conductivity is greater than 20μs/cm) of the measured medium.
The sensor has almost no pressure loss and extremely low energy loss.
Large flow measurement range. The full-scale flow rate in the measured pipe can be set arbitrarily from 1m/s to 10m/s, and the output signal has a linear relationship with the flow rate.
The flowmeter not only has 0~10mA or 4~20mA standard current output, but also 1~5kHz frequency output

Specifications of insertion electromagnetic flowmeter

Medium	Water, sewage water, acid, alkali, etc.
Diameter	Dn300～DN3000mm
Accuracy	±2.5%
Temp. range	-20～+150℃
Pressure	1.6 MPa
Flow rate	0.5～6m/s
Straight pipe required	Upstream≥5DN, downstream≥3DN
Electrode	316L,Hastelloy C(HC), Titanium(Ti), Tantalum(Ta),Platinum(Pt)
Installation way	Without a ball valve or with a ball valve
Body material	Stainless steel
Power supply	220VAC/24VDC/Lithium battery
Signal output	Pulse output, 4～20mA
Communication	RS485,Hart, GPRS etc.
Explosion-proof	No
Protection class	IP65(compact type), IP68(remote type)
Working environment	Temp. Range: -20～+60℃, humidity: 5%～90%

Applications of Insertion Magnetic Flow Meter

Potable Water
Water Distribution
Pumping Stations
Filter Balancing and Backwash
Reclaim Water
Treated Water
Irrigation Water
Cooling Water
Raw Water

Extended reading: 2 inch Water Flow Meter

Insertion magnetic flow meter principle

All MAG Meters operate under the same fundamental principle of classical physics (Faraday’s Law of Electromagnetic Induction):

E = CONSTANT x B x D x V

The law states that the magnitude of the voltage (E) induced in a conductive medium, moving through a magnetic field is directly proportional to the strength of the magnetic field (B), the path length between the probes (D), and the velocity of the medium (V).

In principle and implementation, it is possible to fix all parameters except velocity.

Thus a MAG Meter responds only to “velocity” and is extremely insensitive to changes in fluid conditions (density, viscosity, etc.) and application constraints (pressure, temperature, and mechanical vibrations, as well as fluid pulsation).

The operation of a MAG Meter is completely analogous to an electrical generator.

A voltage is induced in a conductor that is moving at right angles through a magnetic field.

The faster the conductor moves, the more voltage is generated.

You may want to know more about: Magnetic Flow Meters technical guide|What is &How they work?

Advantages of Magnetic Flowmeters

Electromagnetic (MAG) flowmeters have been widely used in industry for over 50 years.

And for good reason, the advantages of MAG meters are irrefutable.

High reliability – no moving parts
No scheduled maintenance
Good accuracy: 0.5% to 2.0% of reading
Very wide range: up to 100:1
No pressure drop
The wide selection of materials
The wide selection of fluids metered

Extended reading: Industrial Magmeters

Typical Installation of Insertion Magnetic Flow Meter

Easy To Install

Place saddle and ball valve
Hot tap
Insert meter and set the depth
Tighten clamp
Provide electrical Ground connection on plastic pipes

Extended Reading: Special Magnetic Flowmeter Installation situation

Choice of installation environment

It should be installed at the lower part of the horizontal pipeline and vertically upwards, avoid installing at the highest point of the pipeline and vertically downwards;
It should be installed on the rising part of the pipeline;
Installation in the open discharge pipe should be installed at the lower part of the pipe;
If the pipeline drop exceeds 5m, install an exhaust valve downstream of the sensor;
The control valve and shut-off valve should be installed downstream of the sensor, not upstream of the sensor;
The sensor must not be installed at the inlet and outlet of the pump, it should be installed at the outlet of the pump.
Keep away from equipment with strong fields, such as large motors and large transformers.
There should be no strong vibration in the installation place, and the pipeline should be firmly fixed. The ambient temperature should not change much.
The installation environment should be easy to install and maintain.

Choice of installation location

The installation location must ensure that the pipeline is always filled with the fluid under test.
Choose a place where the fluid flow pulse is small, that is, away from the pump, valves, elbows and other local resistance parts.

When measuring two-phase (solid, liquid or gas, liquid) fluids, choose a place that is not easy to cause phase separation.

Avoid negative pressure at the measurement site.

The diameter or circumference of the side pipe is easy to measure, and the ovality should be small.

Length of straight pipe

The length of the straight pipe section on the upstream side of the sensor installation pipeline should be greater than or equal to 10D, and the downstream side should be no less than 5D (D is the diameter of the pipeline being tested).

The flow control valve should be installed on the pipe under test on the upstream side of the sensor, and the flow control valve should be installed on the downstream side of the sensor. When measuring, usually the flow control valve should be fully open.

Installation method

Vertical installation, when the sensor is inserted into the pipeline, it should be perpendicular to the central axis of the pipeline, and the included angle with the pipe section is less than 50. It is suitable for measuring clean media with small pipeline vibration.

There are two ways to insert the insertion point of the electromagnetic flow sensor. One is to insert at 1/4 of the inner diameter of the pipe. The other is to insert at 1/2 of the inner diameter of the pipe.

Correctly weld the mounting base to the pipe. Clean up welding slag and burrs on the mounting base of the pipe under test.

Turn off the upstream flow control valve or use a low-pressure water supply.

Install the DN50 ball valve on the mounting base. Note that the long cavity of the ball valve faces upwards. Check whether the ball valve can be fully opened and closed. If there is any problem, repair it. Install the compression threaded seat, compression nut and rubber sealing ring on the ball valve. Loosen the positioning screw and the compression nut, and insert the sensor through the ball valve into the pipe under test. Tighten the compression nut and the positioning screw, and at the same time, pay attention to the insertion direction of the sensor direction sign and the fluid flow direction.

Insertion depth

(1) When selecting the electrode to insert to the average flow rate, the average flow rate point is about H=0.25D from the pipe wall (D: pipe inner diameter) according to the pipeline turbulent flow conditions. Press the handle to make the insertion rod enter the pipe H deep. (L2 at this time = original L2-H)

(2) After confirming that the insertion depth is correct, turn the flow direction rod to make its connection parallel to the centerline of the pipeline. At this time, the connection between the two electrodes will be perpendicular to the centerline of the pipeline. That is, the connection between the electrodes is perpendicular to the flow rate.

(3) After adjustment, first tighten the lock nut firmly, and then tighten the three locknuts separately. One of their functions is to ensure that the insertion rod is not pushed out by the pressure in the tube. The other is to ensure that the insertion rod does not vibrate.

(4) During actual on-site installation, the insertion depth is only allowed to be 0.25D, which is a quarter of the diameter of the pipe. The insertion depth is 0.5D, which is the center of the pipe.

(5) Loosen the fastening screws under the junction box. Rotate the junction box to the position you are satisfied with and tighten the nuts.

The Insertion flowmeter is a type of flowmeter divided by structure. It includes various flowmeters with different working principles.

Usually, the flowmeter and the pipeline are flanged. Only when the processing pipeline is cut off is allowed to be disassembled, repaired, and replaced. This has a great impact on the reliable operation of the system. The Insertion flowmeter fundamentally solves this defect. Although the measurement accuracy is slightly lower. But on some large-caliber occasions, Insertion flowmeters have been used to measure the total amount of fluid.

There are many forms of Insertion flowmeters that have been promoted. According to the working principle of Insertion flowmeter detection heads, they can be divided into Insertion turbine, Insertion vortex, Insertion electromagnetic, uniform velocity tube, and thermal flowmeter. The number of measuring points of the Insertion flowmeter can be divided into two categories: point flow type and runoff type.

The accuracy of the magnetic flowmeter has been calibrated by the calibration line when it leaves the factory. However, at the use site, due to environmental conditions, fluid characteristics, and instrument damage such as component damage. It often causes instrument operation failures. Therefore, the electromagnetic flowmeter needs calibration. Ensuring accurate flow meter performance is an inestimable part of business planning and costing.

More Featured Insertion flowmeters

At present, there are many kinds of Insertion flowmeters in use. According to the working principle of the Insertion flowmeter detection head, it can be divided into Insertion turbine, Insertion vortex, Insertion electromagnetic, Insertion ultrasonic, and Insertion target flowmeter.

The correct choice of the flowmeter is of great significance for flow measurement. Choosing different flow meters under the same working conditions will definitely have a considerable difference in the final measurement results.

If the initial selection is improper, it may even lead to the inability to perform quantitative measurements and cause damage to the instrument. Therefore, it is necessary for users to have a correct understanding of how to choose a suitable flow meter. Knowing some basic selection methods will help make mistakes when choosing meters.

In order to ensure the use of the flow meter in the production site process. The choice of flowmeter, in general, must be determined according to the medium that needs to be measured at the production site.

The advantages of the insertion vortex flowmeter are particularly good anti-vibration performance, no zero drift, and high reliability. Through a large number of waveform analyses and frequency spectrum analyses on the vortex flowmeter for a long time, the probe shape, wall thickness, height, probe rod diameter, and matching piezoelectric crystals are designed.

Insertion Vortex Flow Meter

It adopts an advanced numerical control lathe for processing. It ensures the coaxiality and smoothness of processing and other technical parameters and cooperates with special processing. It overcomes the common problem of the influence of the inherent self-oscillation frequency of the vortex flowmeter on the signal.

The insertion vortex flowmeter is mainly used for the flow measurement of large-caliber gas, liquid, and steam medium fluids in industrial pipelines in various industries.

It is characterized by small pressure loss, a large measuring range, and high accuracy. It is almost not affected by fluid density, pressure, temperature, viscosity, and other parameters when measuring volume flow under working conditions.

Insertion ultrasonic flowmeter can be divided into propagation velocity difference method (direct time difference method, time difference method, phase difference method and frequency difference method), beam shift method, Doppler method, and cross-correlation method according to the principle of signal detection. , Spatial filtering method and noise method, etc.

Ultrasonic Insertion Flow Meter

Ultrasonic flowmeters are the same as electromagnetic flowmeters. Because the flow channel of the instrument is not equipped with any obstructions, it is an unobstructed flowmeter. It is a type of flowmeter suitable for solving difficult problems in flow measurement. Especially in large-caliber flow measurement. The advantages.

Insertion ultrasonic flowmeter is mainly used in petroleum, chemical industry, metallurgy, electric power, water supply, and drainage, and other fields.

The structure of the Insertion turbine flowmeter is an explosion-proof design. It can display the total flow, instantaneous flow, and the percentage of flow full scale. The battery adopts a long-term lithium battery. The battery life of a single-function integrator can reach more than 5 years, and the battery life of a multi-function indicator can reach more than 12 months.

Turbine Insertion Flow Meter

Insertion turbine flowmeter can display many flow units, including cubic meters, gallons, liters, standard cubic meters, standard liters, etc. The fixed pressure and temperature parameters can be set to compensate for the gas. For occasions where the pressure and temperature parameters do not change much, the instrument can be used for fixed compensation accumulation.

Insertion turbine flowmeters are mainly used in metering and control systems in the fields of petroleum, chemical industry, metallurgy, scientific research, and so on.

The Insertion target flowmeter is based on the traditional target flowmeter. With the development of new sensors and microelectronics technology, a new type of capacitive force induction flow Insertion target flowmeter has been developed. It has the characteristics that the flowmeter has no movable parts such as an orifice plate and vortex street. At the same time, it has high sensitivity and accuracy comparable to positive displacement flow meters. The measuring range is wide.

Insertion target flowmeter has good adaptability in the working conditions of small flow, high viscosity, easy to condense and easy to block, high and low temperature, strong corrosion, strong vibration and other flow measurement difficulties. Mainly used for flow measurement in various fields such as metallurgy, petroleum, chemical industry, energy, food, and environmental protection.

More Featured Wastewater Flow Meters

More about: Sewage Flow Meter Selection

Sino-Inst offers all kinds of flow meters, which can work for the wastewater.

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Sino-Inst offers 10 Insertion Magnetic Flow Meters. A wide variety of Industrial flow meters options are available to you. such as free samples, paid samples.

Sino-Inst is an Industrial flow Transmitter supplier, located in China. The top applying countries are China (Mainland), Hong Kong, and the United States, which supply 96%, 2%, and 1% of wireless pressure transmitters respectively.

Insertion Magnetic Flow Meter products are most popular in North America, Domestic Market, and South America. You can ensure product safety by selecting from certified suppliers, with ISO9001, and ISO14001 certification.

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KimGuo11

drurylandetheatre.com

Differential Pressure Flow Meters

Posted on July 25, 2019 by KimGuo11

Differential Pressure (DP) Flow Meters Technology –
Reliable Flow Solutions Across Many Applications

Differential Pressure Flow meters, also known as DP flow meters. Differential Pressure (DP) flow meters introduce a constriction in the pipe, that creates a pressure drop across the flow meter.

The calculation of fluid flow rate, by reading the pressure loss across a pipe restriction, is the most used flow measurement technique in industrial applications.

Differential pressure flow meters are suitable for water flow measurement, oil, steam or gas flow measurement.

According to different flow senor structures, we have:

Orifice Plate Flowmeters;
Venturi Flowmeters;
Nozzle Flowmeters;
Wedge Flowmeters;
Annubar Flowmeter

And more.

RFQ NOW

What is a differential pressure flow meter?

You can take this as the definition of the differential pressure flow meter.

Differential pressure flow meters, also known as DP flowmeters, create a cross-sectional change in the flow tube, which causes the velocity of the flowing fluid to change.

A change in velocity occurs whenever there is a change in flow cross-section; ie, With a decrease in velocity, an increase in pressure occurs.

Differential pressure flow meters can be used as liquid flowmeters or gas flowmeters; however, a single flow meter may not be configured to measure both liquid and gas phases.

Differential pressure (also known as throttling) Flow meters, are based on the throttling principle of fluid flow. It is one of the most mature and most commonly used methods for measuring flow in production. It is usually composed of a throttling device, which capable of converting the measured flow into a differential pressure signal, and a differential pressure gauge, and a display instrument, capable of converting the differential pressure into a corresponding flow value.

In the unit combination meter, the differential pressure signal generated by the throttling device, is often converted to a corresponding standard signal (electrical or pneumatic), by a differential pressure transmitter for display, recording or control.

The differential pressure flow meter is composed of a primary device (detection member), and a secondary device (a differential pressure converter and a flow display instrument).

Types of flow meter

The differential pressure flow meter is usually classified in the form of a test piece, such as an orifice flowmeter, a venturi flowmeter, a constant velocity tube flowmeter, a pitot tube principle-Pitoba flowmeter, and so on.

The secondary device is a variety of mechanical, electronic, electromechanical integrated differential pressure gauges, differential pressure transmitters and flows display instruments.

It has developed into a large-scale instrument with a high degree of categorization (series, generalization, and standardization) and a wide variety of specifications.

It can measure flow parameters as well as other parameters (such as pressure, level, density, etc.).

How does a differential pressure flow meter work?

Differential pressure flow meters use Bernoulli’s equation, to measure the flow of fluid in a pipe.

Differential pressure flow meters introduce a constriction in the pipe, that creates a pressure drop across the flowmeter.

When the flow increases, more pressure drop is created. Impulse piping routes the upstream and downstream pressures of the flowmeter to the transmitter, that measures the differential pressure to determine the fluid flow.

This technology accounts for about 21% of the world market for flow meters.

Bernoulli’s equation states that the pressure drop across the constriction is proportional to the square of the flow rate. Using this relationship, 10 percent of full-scale flow produces only 1 percent of the full-scale differential pressure.

At 10 percent of full-scale flow, the differential pressure flowmeter accuracy is dependent upon the transmitter, being accurate over a 100:1 range of differential pressure.

Differential pressure transmitter accuracy is typically degraded, at low differential pressures in its range, so flowmeter accuracy can be similarly degraded.

Therefore, this non-linear relationship can have a detrimental effect on the accuracy, and turn down of differential pressure flow meters.

Remember that of interest is the accuracy of the flow measurement system — not the accuracy of the differential pressure transmitter.

Different geometries are used for different measurements, including the orifice plate, flow nozzle, laminar flow element, low-loss flow tube, segmental wedge, V-cone, and Venturi tube.

Differential pressure flow meter formula:

where

points 1 and 2 lie on a streamline,
the fluid has constant density,
the flow is steady,
and there is no friction.

Although these restrictions sound severe, the Bernoulli equation is very useful, partly because it is very simple to use. And partly because it can give great insight into the balance between pressure, velocity, and elevation.

To learn more about DP Flow:

Extended reading: Smart Differential Pressure Transmitter

Advantages and disadvantages of differential pressure flow meter

The upside of this technology is low cost, multiple versions can be optimized for different fluids and goals, are approved for custody transfer (though it is being used less and less for this). It is a well-understood way to measure flow. And it can be paired up with temperature/pressure sensors, to provide mass flow for steam and other gasses.

Negatives are that rangeability is not good due to a non-linear differential pressure signal (laminar flow elements excepted), accuracy is not the best and can deteriorate with wear and clogging.

Advantages and disadvantages of throttling differential pressure flow meter (orifice flowmeter)

Advantages:

1) The standard orifice plate structure of the throttle piece is easy to copy, simple, firm, stable and reliable in performance, long in service life and low in price;

2) The throttling application range is extremely wide. All single-phase fluids, including liquid, gas, and steam, can be measured. Some mixed-phase flows, such as gas-solid, gas-liquid, liquid-solid, etc. can also be applied. General production processes and pipe diameters, The working condition (pressure, temperature) has products;

3) All accessories can be used by all manufacturers if it is an international standard and can be used without calibration.

Disadvantages:

1) The repeatability and accuracy of the measurement are medium levels;

2) The range is narrow because the meter signal and the flow rate are squared, the general range can only reach 3:1 ~ 5:1;

3) The requirements for on-site installation conditions are relatively high. If a long straight pipe section is required, it is difficult to meet;

4) The pressure piping is a weak link, which is prone to leakage, blockage, freezing and signal distortion;

5) The pressure loss is large.

Extended reading: Integral DP Flow Meter|Gas, liquid, steam|Compact structure

What is the relationship between flow and differential pressure?

Differential pressure use Bernoulli’s equation to measure the flow of fluid in a pipe.

Differential pressure flow meters introduce a constriction in the pipe, that creates a pressure drop across the flowmeter.

When the flow increases, more pressure drop is created.

y+P(x)y =Q(x)y^n (equation)

is called a Bernoulli differential equation where n is any real number.

The graph below shows the resulting pressure drop for water at 60 F, over a range of flow rates for a 100-foot long pipe, for both 4 inches and 6-inch schedule 40 piping.

the relationship between flow and differential pressure

If you need, you can learn more about Flow Rate And Pressure Relationship.

How to Select a Flow Meter?

The basis of good flow meter selection is a clear understanding of the requirements of the particular application.

Therefore, time should be invested in fully evaluating the nature of the process fluid and of the overall installation.

What is the fluid being measured by the flow meter(s) (air, water, etc…)?
Do you require rate measurement and/or totalization from the flow meter?
If the liquid is not water, what viscosity is the liquid?
Is the fluid clean?
Do you require a local display on the flow meter or do you need an electronic signal output?
What are the minimum and maximum flow rate for the flow meter?
What are the minimum and maximum process pressure?
What are the minimum and maximum process temperature?
Is the fluid chemically compatible with the flow meter wetted parts?
If this is a process application, what is the size of the pipe?

Types of Differential Pressure Flowmeters

Flat metal plate with an opening in the plate installed perpendicular to the flowing stream in a circular pipe.

As the flowing fluid passes through the orifice, the restriction causes an increase in velocity and a decrease in pressure.

A differential pressure transmitter is used to measure pressure between the orifice and the pipe flow stream.

There is always a permanent pressure loss. No dirty liquids allowed.

Orifice differential pressure flowmeters can be constructed to measure gas, liquid or steam.

Orifice plates are primary flow elements which measure flow as a function of differential pressure.

A restriction with a relatively long passage having a smooth entry and exit.

A venturi produces less permanent pressure loss than an orifice but is more expensive.

They are often used in dirty streams because there is no build-up of the foreign material.

Venturi flow meters can be constructed to be either gas flowmeters or liquid flow meters.

Extended reading: What Is A Venturi Flow Meter?

Smooth entry and sharp exit. Permanent pressure loss is on the same level as an orifice, with the added ability to handle dirty and abrasive fluids.

A differential pressure transmitter is used to measure pressure between the nozzle and the pipe flow stream.

This type of differential pressure flowmeter technology can be constructed to measure either gas or liquids.

Extended reading: What is a flow nozzle?

A device consisting of a Pitot tube and an annubar tube combined with static pressure ports.

The differential pressure between the two ports is the velocity head.

A differential pressure transmitter is used to measure pressure differential between the two ports.

This indication of velocity combined with the cross-sectional area of the pipe provides an indication of flow rate.

Pitot tube flow meters can measure either liquids or gases.

Differential pressure is caused by centrifugal force between the inside diameter and the outside walls of the pipe elbow.

It does not introduce any additional pressure loss other than that caused by the elbow.

A differential pressure transmitter is used to measure pressure between the walls.

This type of flow meter technology can be configured as either a gas or a liquid flow meter.

A wedge-shaped element that is perpendicular to the flow at the top of the conduit which means that the bottom part is unrestricted.

Therefore, it is useful in slurry measurement.

A differential pressure transmitter is used to measure pressure between either side of the wedge.

However, this type of differential pressure flow meter technology can be constructed to work as either a gas or a liquid flow meter.

Consists of a V-shaped cone element placed at the center of the pipe which creates an annular space for the passage of fluid.

It has a lower permanent pressure loss than orifice flowmeter.

The cone element conditions the flow at the same time it is creating the pressure differential, providing for smoother and less noisy differential pressure readings vs. the orifice technology.

A differential pressure transmitter is used to measure pressure before and after the cone.

This type of differential pressure flow meter can be constructed to measure gases, liquids, or steam.

This type of flow meter relates a change in flow rate to the differential pressure across a spring-loaded cone.

The cone repositions itself to balance the force.

This, in turn, changes the aperture for the flow.

Flow rate has a relationship with the differential pressure of the flow meter and the position of the spring-loaded cone.

A differential pressure transmitter is used to indicate flow.

This type of differential pressure flow meter technology can be constructed to measure either gas or liquids.

Flow rate is linearly proportional to the differential pressure and inversely proportional to the viscosity of the flowing fluid.

A flow can be made laminar by passing through a bundle of small diameter tubes.

A differential pressure transmitter is used to measure pressure before and after the tubes.

This type of differential pressure flow meter technology can be constructed to measure either gas or liquids.

Featured DP Flow Meters for Sale

Venturi Flow Meter

Posted on June 15, 2019 by KimGuo11

Venturi flow meter is also called classical venturi, and is used to call venturi meter, standard venturi. It is used to measure the flow of single-phase stable fluid in closed pipelines.

Venturi flow meter is a flow measurement method based on the principle of differential pressure. Commonly used to measure the flow of fluids such as air, natural gas, coal gas, and water. In the standard throttling device, the upstream and downstream straight pipe sections required by it are short. The lasting pressure loss is small, the performance is stable, and the maintenance is convenient.

Sino-Inst, Manufacturer for differential pressure flow meters. Including the Orifice plate, Venturi, Annubar, etc. Suitable for liquid, gas, and steam flow measurement. Please contact our sales engineers for technical support!

Get a Quote DP Flowmeters

Features of Venturi flow meter

Less head loss than an orifice or nozzle meter, due to the streamlined design
Ideal for clear gas, liquid or steam applications
Available in many materials and end arrangements
Can be equipped with fittings to accept secondary instrumentation packages

The classic venturi tube is simple, durable and stable in performance.

Classic venturi pressure loss is small, saving the energy needed for fluid delivery.

Classic venturi tube in the range of 50 ~ 1200.

No real-flow calibration is required.

Beyond this range, you can refer to the design and manufacture.

When high precision is required, real-time calibration is possible.

The body is installed in long size, and it is not convenient for transportation and installation for large-diameter instruments.

What is a venturi flow meter?

Venturi flowmeter, also known as venturi tube flow meter. It is a commonly used device for measuring the flow of pressurized pipelines.

It is a differential pressure flowmeter, and is commonly used to measure the flow of air, natural gas, gas, water, and other fluids.

It consists of a “contraction section”, a “throat” and a “diffusion section”, which are installed on the pipe where the flow rate needs to be measured.

The classic venturi tube is designed and manufactured, according to China GB/T2624-93, and is verified according to the verification procedure JJG640-94.

In the standard throttling device, it requires the shortest upstream and downstream straight pipes, the lowest pressure loss, stable performance, and convenient maintenance.

Because of its accurate calculation and low energy consumption, it has been widely used in petroleum, chemical, electric power, and metallurgy industries.

Venturi flow meter parameters:

1. Nominal diameter: 50mm≤DN≤1200mm (more than this range needs to be calibrated)

Roughcasting shrinkage section: 100mm ≤ DN ≤800mm

Mechanical processing shrinkage section: 50mm ≤ DN ≤ 250mm

Shrinking section of rough welded iron plate: 200mm≤DN≤1200mm

2. Throttle aperture ratio β: 0.3 ≤ β ≤ 0.75

Roughcast shrinkage segment: 0.3 ≤ β ≤ 0.75

Machining shrinkage section: 0.4 ≤ β ≤ 0.75

Coarse section of rough welded iron plate: 0.4≤β≤0.7

3. Reynolds number range: 2 × 10 5 ≤ ReD ≤ 2 × 10 6

Rough cast shrinkage section: 2 × 10 5 ≤ ReD ≤ 2 × 10 6

Machining shrinkage section: 2 × 10 5 ≤ ReD ≤ 2 × 10 6

Shrinkage section of rough welded iron plate: 2×10 5≤ReD≤2×10 6

4. Accuracy level: 1

Venturi Flow Meter PDF

LG-WQL Standard Venturi Download

Classic venturi flowmeter structure

The axial section of the classic venturi is shown in the figure above.

It is composed of an inlet cylinder section A, a conical contraction section B, a cylindrical throat C, and a conical diffusion section E.

The diameter of the cylinder section A is D, the length is equal to D. The contraction section B is conical and has an angle of 21 ° ± 1 °. The throat C is a cylindrical shape of diameter d, the length of which is equal to d;

E is conical and has a diffusion angle of 7° to 15°.

The constricted section of the classic venturi is divided into three forms: a coarse cast shrinkage section, a machined shrinkage section, and a coarse welded iron plate shrinkage section.

The upper-pressure port and the throat pressure port of the classic venturi, are made into several (not less than four) separate tube wall pressure ports.

And several separate tube walls are pressure-connected by a pressure-equalizing ring.

When d≥33.3mm, the diameter of the throat pressure port is 4~10mm, the diameter of the upstream pressure port should be no more than 0.1D. When d≤33.3mm, the diameter of the throat pressure port is 0.1d~0.13d. The diameter of the upstream pressure tap is 0.1d to 0.1D.

Extended reading: How to realize the flow accumulation function in PLC?

Venturi meter working principle

The Venturi flow meter produces a differential pressure, to calculate the flow rate through a pipe.

The meter works by measuring the pressure of fluid before and after it passes through a narrow tube; the pressure difference indicates the volumetric rate of flow.

The basic measurement principle of the new generation, of differential pressure flow measuring instruments, is the flow measurement method based on the law of conservation of energy – the primary effort equation and the flow continuity equation.

The inner venturi consists of a circular measuring tube, and a special core placed in the measuring tube and coaxial with the measuring tube.

The outer surface of the special core has a geometric profile, similar to the inner surface of a classic venturi. And forms a different diameter annular flow gap with the inner surface of the measuring tube.

How does a Venturi meter work?

The working of venturi meter is based on the principle of Bernoulli’s equation.

Bernoulli’s Statement:

It states that in a steady, ideal flow of an incompressible fluid, the total energy at any point of the fluid is constant.

The total energy consists of pressure energy, kinetic energy, and potential energy or datum energy.

Mathematically:

Here all the energies are taken per unit weight of the fluid.

The Bernoulli’s equation for the fluid passing through the section 1 and 2 are given by

Flow tools:

DP Flow Meter Output Calculator	Flow Meter 4-20mA Current Output Calculator	Flow Velocity & Pipe Diameter to Volumetric Flow Rate Calculator
Mass Flow & Density to Volume Flow Calculator	Mass Flow Rate Unit Converter	Volume Flow Rate Converter
Volume Flow & Density to Mass Flow Calculator	Volumetric Flow Rate & Pipe Diameter to Flow Speed Calculator

Venturi Flow Meter Applications

Since its development, venturi products have been successfully applied to the measurement of high-humidity natural gas, low-pressure dirty biogas, coke oven gas, gas, steam, hot water, high-temperature hot kerosene, etc., And the practical application range is rapidly expanding.

Besides, the venturi tube has a unique measurement advantage, for measuring conditions such as long straight pipe installation conditions, special high temperature, high pressure, strong corrosive and dirty media, and non-single phase flow measurement.

Of course, in the sewage and wastewater treatment industry, in addition to venturi flowmeters, electromagnetic flowmeters are also the first consideration for many users.
For example, if you need to measure the flow of wastewater in a 2-inch pipe. Then you can refer to: Magnetic Flow Meters Guides.

Extended reading: Flow Nozzle for Steam Flow Measurement

Orifice meter vs Venturi meter

The orifice flow meter is a flowmeter with a variable cross-sectional pressure difference.

The velocity at the vein is the largest, the pressure of the fluid is minimized, the structure is simple, but the resistance loss is large.

The Venturi flow meter is also a flowmeter with a variable cross-section pressure difference.

On the basis of the orifice flowmeter, the orifice plate is replaced by a lengthy and gradually expanding short tube, and the structure is simple, the resistance loss is small, but the cost is high.

The orifice flowmeter is similar to the venturi flowmeter, in terms of working principle. But some of the main differences are that the orifice plate can be easily replaced. Adapting to a wide range of different flow rates, while the venturi’s throat diameter is fixed.

The measured flow rate range is limited by the actual pressure difference.

Due to the vortex on the downstream side of the orifice plate, the permanent loss of the orifice flowmeter is large. And the structural shape of the venturi flowmeter can avoid the formation of vortices.

Thus, permanent losses can be greatly reduced.

Venturi flowmeters consume much less energy in measuring flow than orifice flowmeters.

But because venturi flowmeters are more time consuming and expensive than orifice flowmeters, in manufacturing and processing.

Orifice flowmeters is the least troublesome when installing the pipeline and the lowest cost.

In fluid measurement, venturi flowmeters are typically used for the measurement of gas flow at low flow rates.

The orifice flow coefficient in orifice flowmeters is significantly affected by fluid disturbances, which are generated upstream of the orifice plate.

The influence of valves, elbows and other fittings.

The value of its flow coefficient is less affected by downstream disturbances.

Typically, such flow meters should be installed at 50 and 10 pipes diameters, from the upstream and downstream disturbance components, respectively.

It is obvious that the required distance is related to the nature of the disturbance.

Therefore, when measuring with an orifice flowmeter, the orifice flowmeter must be properly installed according to the disturbance of the fluid.

Through the specific analysis and comparison of the orifice flowmeter and the venturi flowmeter, the advantages and disadvantages between them can be seen. And the user is reminded to analyze and compare more when selecting the flowmeter.

In this way, you can choose the measurement tools you need.

Extended reading: [Working principle&Price]SI3051ANB Annubar Flow Meter

Pitot Tube vs Venturi Meter

Pitot tube flowmeter is a new type of advanced insertion type differential pressure flowmeter. It is designed and manufactured according to the standard of IS03966 “Measurement of Fluid Flow in Closed Pipeline – Velocity Area Method Using Pitot Tube Static Pressure Tube”.

To meet the different measurement requirements of different field conditions, Pitot tube flow sensors are divided into standard and functional structures.

The standard type is suitable for the measurement of pure gas, steam, liquid and various chemical materials and liquids. The function is suitable for the working conditions of easy blockage, adhesion, high impurity content, and solid-liquid mixed flow such as various coal gas in the metallurgical industry. Measurement of gas, steam and various liquids.

Smart Pitoba flowmeter is easy to scale and easy to install. Just make a hole in the pipeline. Insert the Smart Pitoba into the center of the pipeline. Connect it with the pipeline by welding or flange.

The difference between Pitot tube vs venturi meter, in simple terms:

Pitto is taking advantage of the same point.
The only difference between the total pressure and the static pressure is the dynamic pressure V2/2g to obtain the speed and flow.
The Venturi nozzle is used to pass through two points of variable diameter.
The measured pressure difference is the dynamic pressure increase (or static pressure decrease).
List the continuity equation with the product of diameter and velocity.
Then find the speed and flow.

Frequently
Asked
Questions

Help Center

Yes, Venturi tubes can measure volume flow. To be precise, the Venturi tube measures differential pressure. The differential pressure signal is transmitted to the integrator or the monitoring system, and the compensation operation is performed. is further converted into traffic. Most customers monitor volume flow.

The Venturi effect, also known as the Venturi effect. This phenomenon is named after its discoverer, the Italian physicist Giovanni Battista Venturi.

This effect is manifested when the restricted flow passes through the narrowed flow section. The flow velocity of the fluid increases, and the flow velocity is inversely proportional to the flow section.

And according to Bernoulli’s law, the increase of flow velocity is accompanied by the decrease of fluid pressure. That is, the common Venturi phenomenon.

In layman’s terms, this effect means that a low pressure will be generated near a fluid flowing at a high speed, resulting in adsorption. Using this effect, a venturi can be made.

Venturi Flow Meter is a device for measuring the flow of a pressure pipeline, which belongs to a differential pressure flowmeter. It is generally installed on the pipeline that needs to measure the flow, and can measure the flow of air, natural gas, gas, water and other fluids.
Venturi Flow Meter is widely used in many energy and power industries such as gas, electricity, cement, etc. due to its simple structure, wide range of applicable working conditions, and easy real-time monitoring.

When the fluid flows through the orifice plate of the orifice flow instrument device, the cross-sectional area decreases and the velocity increases. The corresponding pressure decreases. And the degree of reduction is proportional to the fluid velocity in the flow state.

Therefore, the flow rate can be calculated by detecting the pressure difference, and then the flow rate can be calculated.

Under normal circumstances, if we want to measure differential pressure, we can directly purchase a differential pressure transmitter.

However, in fluid pipelines. The differential pressure of the fluid cannot be measured directly. A throttle is required.

When the differential pressure flowmeter measures the fluid flow parameters, it is based on the differential pressure generated by the throttling part. When the fluid passes through the throttling part, because the pipe section becomes narrower. Therefore, the flow velocity of the fluid in the pipeline increases, and the kinetic energy of the fluid also increases. increased accordingly.

Ideally, when the fluid velocity increases, part of the static pressure will be converted into fluid kinetic energy. The static pressure value of the fluid will decrease accordingly.

At this time, a pressure difference is generated, and there is a certain functional relationship between the pressure difference and the fluid flow. Only by measuring the pressure difference, the flow value of the fluid can be determined.

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Sino-Inst, China, supplies all kinds of Flow Meters. Provide professional flow measurement solutions.

Sino-Inst offers over 50 flow meter products. About 50% of these are differential pressure flow meters (like the Orifice flowmeter), 40% are Magnetic Flow Meters, and 40% are Thermal mass flowmeters.

A wide variety of Annubar flow meter options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of flow measurement instrumentation, located in China.

The top supplying country is China (Mainland), which supply 100% of the turbine flow meter respectively. Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide.

You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

Request a Quote

Please enable JavaScript in your browser to submit the form

KimGuo11

drurylandetheatre.com

VERIS Verabar Flow Meter

Posted on June 15, 2019 by KimGuo11

The VERIS Verabar Flow Meter, also called the Verabar Averaging Pitot Tubes, is a kind of differential pressure flow meter.

The SI-VL Verabar Flow Meter is designed with an aerodynamic engineering structure and is a sensor element. The VERIS Verabar Flow Meter is a plug-in flow meter. A Verabar tube sensor is inserted into the pipe. When the fluid flows through the sensor, a high-pressure distribution zone is created in the forward direction of the flow. And a low-pressure distribution zone is created in the rear. Verabar Flow Meter can be used to measure dry gas, humid gas, liquid or vapor, without being limited by dielectric constant.

Get a Quote DP Flowmeters

Features of VERIS Verabar Flow Meter

The measure parts design base on-air dynamic principle
The static pressure hole on the back side, produce the static pressure before split point between fluids and transducer, is the stable pulse signal
Without removable parts, which can insure long term of the transducer, and also can insure long term stability, eliminate the precision drift
Dust prevention. VERIS Verabar flow sensor is installed on both side of the transducer, not sensitive to medium particle and dust
Uniform veloc
ity tube flow sensor made of special material, in order to meet the demand of corrosive, high temperature, and pressure
Easy to install;

SI-VL Verabar flow meter Specifications

Applicable pressure: 0～30MPa
Applicable temperature: -25 ~ +550 degrees
Measurement accuracy: 1.5%
Repeatability: 0.5%
Sensor material: 304, 316L or special order
Pipe size: DN38 ~ DN15000 round pipe or square pipe
Turndown ratio: 10:1
Flow range: the upper and lower limits of the measurement are at the probe strength and the minimum allowable differential pressure

Verabar flowmeter measures the required minimum flow rate and differential pressure

Medium	Flow rate	Minimum differential pressure
Gas	3.5m/s	0.025kpa
Liquid	0.6m/s	0.25kpa
Steam	9.0m/s	0.38kpa

VERIS Verabar flow sensors combined with Sino-Inst differential pressure transmitters. Provide the most reliable and accurate DP flow measurement solution on the market.

Differential pressure transmitter is a transmitter that measures the pressure difference between the two ends of the transmitter. The differential pressure transmitter outputs standard signals (eg 4 ~ 20mA, 0 ~ 5V). DP transmitters are different from pressure transmitters as they have 2 pressure interfaces. Differential pressure transmitters are generally divided into positive and negative pressure end. In general, the pressure at the positive end should be greater than the pressure in the negative section to measure. With flanges, capillaries, valve, brackets, throttle devices. Differential pressure transmitters are used to measure the level, density, and pressure of liquids, gases, and vapors. Then convert it into 4–20mADC current signal output.

Extended reading: [Working principle&Price]SI3051ANB Annubar Flow Meter

3-Types of Verabar Flowmeters

SI-VL200 verabar flow meter

The VL200 can be inserted and removed under pressure.

Use this model when you can not shut down the pipe to insert the sensor.

The VL200 is the most frequently sold hot-tap model.

It is available in single rod and double rod units for high pressure.

SI-VL350 verabar flow meter

The VL350 can be inserted and removed under pressure.

The insertion mechanism (Jack) can be removed and used on multiple pipes.

The Jack can be stored in a dry location away from the elements making it ideal for outdoor and coastal installations.

SI-VL400 verabar flow meter

The VL400 can be inserted and removed under pressure.

Similar to a VL200 except it has a flanged connection to the pipe for added sealing capability.

When plant regulations require a flanged hot tap connection, the VL400 is the correct model to use.

It is available in single rod and double rod units for high pressure.

VERIS Verabar Flow Meter Structure

The Verabar meter flowmeter consists of a detection rod, pressure tap, and a guide rod.

The cross-sectional shape of the detection tube of Verabar is divided into a variety of structures such as a circle,a diamond shape, and an elliptical shape.

What is Verabar Flow Meter?

The VERIS verabar flow meter is a high precision measuring instrument. Based on the principle of a piton tube measurement and applies the air dynamic theory.

Verabar flow meters belong to differential pressure flow meters, rate average of the flow sensor.

It measure flow rate through the differential, between average total pressure and static pressure, which often is used to measure the flow rate of the liquids, steam, and gas.

Extended reading: What Is A Venturi Flow Meter?

VERIS Verabar flow meter working principle

When the fluid flows through the probe, a high-pressure distribution zone is created at the front.

And the pressure in the high-pressure distribution zone is slightly higher than the static pressure of the pipeline.

According to the Bernoulli equation, the velocity of the fluid flowing through the probe is increased, and a low-pressure distribution zone is generated at the rear of the probe.

The pressure in the low-pressure distribution zone is slightly lower than the static pressure of the pipeline.

The fluid flows from the probe and creates a partial vacuum, at the back of the probe with vortices on either side of the probe.

The cross-sectional shape of the constant velocity flow probe, the rough surface condition and the position of the low-pressure tapping orifice are key factors, in determining probe performance.

The stability and accuracy of the low voltage signal are decisive for the accuracy, and performance of the uniform velocity probe.

The Verabar average velocity probe detects the average differential pressure produced, by the average velocity of the fluid.

The VERIS Verabar average velocity flow probe has multiple pairs of pressure tapping holes, arranged in certain directions in the high and low-pressure areas, which makes it possible to accurately measure the average flow rate.

Applications of Verabar Flow Meter

VERIS Verabar flowmeters are widely used in power plants, petrochemicals, metallurgy, water treatment, fine chemicals, environmental protection and other industries.

Verabar flowmeters are used in a wide range of applications for a wide range of gas, liquid and vapor measurements.

The following are typical application media.

Water Treatment
Pump Testing
Paper & Pulp
Effluent Treatment Plants
Waste Water & Sewerage
Food & Dairy Processing
Chemical Process Plants
Gas/Liquid/Steam;
Natural Gas
Cooling Water
Saturated Steam;
Compressed Air
Boiler Water/Superheated Steam;
Gas/Demineralized Water;
Gas Hydrocarbon/Liquid Hydrocarbon;
Hot Air/Cryogenic Liquid;
Producer Gas/Thermal Liquid

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LR series Integral flange Magnetostrictive level sensor

LT series Digital Display Magnetostrictive liquid level sensor

LD series Rigid Probe Magnetostrictive Level Transmitter

Sino-Inst offers over 10 VERIS Verabar flow meter products. These are differential pressure flow meters, 40% are water meters (like the Insertion Turbine Flow Meter), and 40% are water treatment (like the Annubar flow meter ).

A wide variety of VERIS Verabar flow meter options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of VERIS Verabar flow meter, located in China. The top supplying country is China (Mainland), which supply 100% of the VERIS Verabar flow meter respectively.

Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. VERIS Verabar flow meter products are most popular in Domestic Market, Southeast Asia, and Mid East.

You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

Request a Quote

Please enable JavaScript in your browser to submit the form

KimGuo11

drurylandetheatre.com

SI 3051ANB Annubar Flow Meter

Posted on June 15, 2019 by KimGuo11

Annubar flow meter also known as flute-shaped constant velocity tube flow meter and Toba tube flow meter. Annubar flow meter is a differential pressure flow meter.

Annubar Flow Meter is a no-equal solution with a patented, averaging pitot tube that delivers superior measurement accuracy over a wide flow range. This flow meter can measure multiple variables and is engineered with an integrated thermowell for temperature measurement. Its patented T-shaped sensor is capable of obtaining measurements via a single pipe penetration while maintaining a small profile in the pipe to reduce permanent pressure loss and increase energy savings.

Get a Quote DP Flowmeters

Features
Technical Parameters
Applications

Features of SI 3051ANB Annubar Flow Meter

Honeycomb hexagonal stable structure,increasing the range ratio.
Suitable for square or rectangular pipes.
For the unavoidable clogging problem of similar products in measuring dirty media, achieve non-stop production maintenance.
Average speed tube + three valve group + temperature pressure compensation + transmitter, form an integrated structure, easy to use.
No flow coefficient drift, long-term stability.
Exclusively provide intuitive resonance check to ensure long-term stable operation.
Low pressure loss, low energy consumption, significant energy saving effect.
Easy to install and save labor, low price and fast delivery (1 week)

Annubar Flow Meters’ technical parameters

Suitable for measuring the flow of liquids, gases, and steam.
The maximum working temperature of 1300 ° C (with appropriate materials and mounting parts).
The highest working pressure up to 400Bar (40MPa)
The highest viscosity is 500 cp
The length of the upstream and downstream straight pipe sections is required to be short.
Standard stainless steel grade.
Long-term accuracy is not affected by wear and tear.
Specifications: DN50-DN5000 (mm); insert: DN500-DN5000 (mm);
Measurement accuracy: ±6.0%; repeatability: ±0.1%;
Range:
- volume flow: 10:1;
- mass flow: 8:1;4,
- working pressure: the average speed tube does not propose a functional type: ≤ 20MPa;
- the average speed tube can be proposed type: ≤ 10MPa;
Fluid temperature: ≤ 450 ° C; Medium viscosity: ≤ 30CP (equivalent to heavy oil);
Material:
- Average speed tube, three valve group: various grades of stainless steel (optional);
- Main pipe, flange: stainless steel or carbon steel (optional);

Annubar-flow-meter-ManualDownload

Application of the Annubar flow meter

The output of the Annubar flowmeter is a differential pressure signal.

It can be used with instruments that measure differential pressure to accurately measure a variety of liquids, gases and vapors (superheated steam and saturated steam) in the He-shaped pipe and rectangular pipe.

The size of the pipe to be tested ranges from 20MM to 5000MM. Annubar has been successfully used in the chemical industry, (including the nuclear industry) chemical industry, petrochemical industry and metal smelting industry.

It is suitable for:

Gas delivery and liquid delivery
Energy research, steam boiler heat rate, pump efficiency.
Gas compressor efficiency and fuel consumption
Process control: input and output, ratio, balance; cooling water or air, steam heating.
Feeding in the chemical industry

The Use and Characteristics of the Annubar flowmeter

The Annubar flowmeter is an ideal substitute for differential pressure fow measurement. Because of its simple installation, low-pressure loss, high strength, no wear and no leakage.

It can be widely used in industrial and mining enterprises to measure the flow of blast furnace gas, compressed air, steam and other liquids and gases.

1. The unique internal secondary average structure provides high precision (±1% reading), and high repeatability (±0.1%).

2. The outer impact tube of the Annubar flowmeter, is processed by a single piece of material without welding.

It has the highest strength, compared with similar products welded by the double-body structure. And it is also convenient to use high-temperature resistance and corrosion resistant material.

Working principle of Annubar flow meter

When the fluid flows through the probe, a high-pressure distribution zone is created at the front. And the pressure in the high-pressure distribution zone is slightly higher than the static pressure of the pipeline.

According to the Bernoulli equation, the velocity of the fluid flowing through the probe is increased. And a low pressure distribution zone is generated at the rear of the probe.

The pressure in the low-pressure distribution zone is slightly lower, than the static pressure of the pipeline.

The fluid flows from the probe and creates a partial vacuum, at the back of the probe with vortices on either side of the probe.

The cross-sectional shape of the constant velocity flow probe, the rough surface condition and the position of the low-pressure tapping orifice are key factors, in determining probe performance.

The stability and accuracy of the low voltage signal, is decisive for the accuracy and performance of the uniform velocity probe.

The Annubar average velocity probe detects the average differential pressure, produced by the average velocity of the fluid.

The Annubar average velocity probe has multiple pairs of pressure tapping holes, arranged in a certain standard in the high and low-pressure zones, making it possible to accurately measure the average flow rate.

Annubar Flow Meter Calculation

The flow calculation formula of the uniform velocity tube flowmeter is derived from the Bernoulli equation and the continuity equation:

Qv=α﹒ ε﹒ (π/4)﹒ D2﹒ (2P/ρ1)0.5
Qm=α﹒ ε﹒ (π/4)﹒ D2﹒ (2?P﹒ρ1)0.5
Among them: Qv: volume flow
Qm: mass flow
α: Sensor structure coefficient
△P: Differential pressure value
ε: fluid expansion coefficient
ρ: Density under fluid conditions
ε: fluid expansion coefficient
For incompressible fluid ε=1, for compressible body ε<1. If D, △P, and ρ1 in the formula all use SI units, the unit of QV is M3∕S. The unit of Qm is ㎏∕S.

How Averaging Pitot Tubes Work-Annubar Technology

Video source: https://www.youtube.com/embed/ofiQPZkGPJM?rel=0

Advantages and Disadvantages of the Annubar flowmeter:

Advantages:

Can be inserted through a small opening.
Can be used to sample the velocity at several points.
Reasonable design, easy installation, and economy
Low-pressure drop, minimal obstruction.
High accuracy and good stability

Disadvantages:

Single point measurement.
The pitot tube is fragile
DP signal is low.

Annubar flow meter calibration

The annubar flowmeter is a commonly used type of flowmeter. It is a new type of differential pressure flow detection component, developed based on the principle of pitot tube velocity measurement.

It has the advantages of stable performance, flexible use and high reliability.

1. Connect the signal cable and power cable;

2, open the import and export valves, the inlet and outlet valves must be consistent

3. Open the stainless steel three-valve balance valve, slowly open the high-low pressure end of the orifice plate, and close the stainless steel three-valve balance valve, after the fluid passes through the flowmeter.

Annubar flowmeter installation pipeline conditions:

(1) The straight pipe sections before and after the throttle piece must be straight, and must not be visible to the naked eye.

(2) The straight pipe section used for installing the throttle piece should be smooth. If it is not smooth, the flow coefficient should be multiplied by the roughness correction sparse.

(3) In order to ensure the flow of the fluid, a fully developed turbulent velocity distribution is formed in the 1D before the throttle. And the distribution is made into a uniform axisymmetric shape, so:

1). The straight pipe section must be round. And the roundness of the 2D range of the throttle is very strict and has a certain roundness index.

Specific measurement method:

(A) On the OD, D/2, D, 2D 4 vertical pipe sections of the throttle, measure the inner diameter of the four pipes, at least equal to each other with an equal angular distance, and take the average value D.

The difference between the measured value of internal diameter, and the average value shall not exceed ±0.3%.

(B) After the throttle element, 8 inner diameter single measured values are measured, by the above method at the OD and 2D positions. And any single measured value is compared with D. And the large deviation of zui must not exceed ±2%.

2). Before and after the throttle element, a straight pipe section of sufficient length is required.

The length of the straight pipe section which is long enough. And the form of the local resistance part. Before the throttle element are related to the diameter ratio β.

(4) The length of the straight pipe section between the upstream side of the throttle member, the resistance member and the second resistance member may be 1/2 of the listed value. According to the form of the second resistance member, and β = 0.7 (regardless of the actual β value)

(5) When the upstream side of the throttle member is an open space, or a large container with a diameter ≥ 2D, the open space or the straight pipe length, between the large container and the throttle member shall not be less than 30D (15D).

If there are other local resistance members, between the throttle member and the open space or the large container. The open space is from the open space to the length of the small straight pipe section 1 provided, between the throttle member and the local resistance member.

The total length of the straight pipe section between the throttle pieces shall not be less than 30D (15D).

Frequently
Asked
Questions

Help Center

Annubar flow meter is sometimes referred to as Averaging pilots and contains multiple pressure tappings to ‘average’ the flow; this is to try to compensate for a non-ideal flow profile.
The averaging pitot tube is inserted across the pipe as shown below. One side of the bar has pressure taps facing the flowing fluid that are coupled into an “averaging” chamber that measures the total (i.e. static + dynamic) pressure of the fluid.

There are numerous types of flow meters depending upon the application, the specific fluid, and the construction, including materials, of the flow meter. The 5 basic classifications of flow meters include:
1. Differential Pressure Flow Meters
Differential pressure flow meters measure the differential pressure across an orifice where flow is directly related to the square root of the differential pressure produced. There are also primary and secondary elements in differential flow meters. The primary element produces a change in kinetic energy using either flow nozzle, pitot tube, orifice plate, or venturi flow meters. The secondary element measures the differential pressure and provides the signal.
Differential pressure meters represent around 1/5 of all flowmeters around the world. They are commonly used in the oil & gas industry, along with HVAC, beverage, water, pharma, mining, paper, and chemical applications.

Extended reading: What Is A Venturi Flow Meter?
2. Positive Displacement Flow Meters
Positive displacement (PD) flow meters measure the volume filled with fluid, deliver it ahead and fill it again, which calculates the amount of fluid transferred. It measures the actual flow of any fluid while all other types of flow meters measure some other parameter and convert the values into flowrate. In PD flow meters, the output is directly related to the volume passing through the flow meter. PD flowmeters include piston meters, oval-gear meters, nutating disk meters, rotary vane type meters, etc.
Positive displacement flow meters are known for their accuracy. They are commonly used in the transfer of oils and fluids, like gasoline, hydraulic fluids as well as in-home use for water and gas applications.
3. Velocity Flow Meters
Velocity meters measure the velocity of the stream to calculate the volumetric flow rate. These are less sensitive when the Reynolds number of fluid is higher than 10000. Velocity flow meters include turbine, paddlewheel, vortex shedding, electromagnetic, and sonic/ultrasonic flow meters.
4. Mass Flow Meters
Mass flow meters are more effective in mass-related processes as they measure the force that results from the acceleration of the mass. More specifically, the force is measured as the mass moving per unit of time, instead of the volume per unit of time. Mass flow meters include Coriolis mass meters and thermal dispersion meters.
Typical applications for mass flow meters are tied to chemical processes. In addition to the chemical and gas industries, typical industries using mass meters include pharma, power, mining, and wastewater.
5. Open Channel Flow Meters
Measurement of liquid in open channels includes v-notch, weirs, and flumes. These dam-like structures, or overflows, allow for a limited or concentrated free-flow of liquids based on the unique shape and size of the structure. This type of flow meter allows for a reading of the flow rate to be calculated.
Common applications of open channel meters include free-flowing liquids like streams, rivers, irrigation channels, and sewer/wastewater systems.

From Wikipedia:

The biggest difference between an annubar and a pitot tube is that an annubar takes multiple samples across a section of a pipe or duct. In this way, the annubar averages the differential pressures encountered accounting for variations in flow across the section. A pitot tube will give a similar reading if the tip is located at a point in the pipe cross section where the flowing velocity is close to the average velocity.

Sino-Inst offers over 10 Annubar Flow Meter products. These are differential pressure flow meters, 40% are water meters (like the Insertion Turbine Flow Meter), and 40% are water treatment (like the Annubar flow meter ).

A wide variety of Annubar Flow Meter options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Annubar Flow Meter, located in China. The top supplying country is China (Mainland), which supply 100% of the Annubar Flow Meter respectively.

Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Annubar Flow Meter products are most popular in Domestic Market, Southeast Asia, and Mid East.

You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

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KimGuo11

drurylandetheatre.com

Handheld Ultrasonic Flow Meter

Posted on June 14, 2019 by KimGuo11

Handheld ultrasonic flow meter realizes the non-contact measurement of liquid flow. Also often referred to as Portable Clamp-On Ultrasonic Flow Meter for Liquids.

Handheld Ultrasonic Flow Meter ( Model:2000H) has been successfully applied to measurement work in various industries. The measuring range is 20-6000mm (0.5-20 inches). A non-contact measurement method is adopted. Flexible operation and easy to carry. Conductive or non-conductive, corrosive or non-corrosive liquids can be measured. Various fluids: water, pure water, sewage, sea water, chemical fluids, river water, fuel Oil etc. can be measured.

Handheld Ultrasonic Flow Meter Reference price: USD 470.00/pc

Sino-Inst offers a variety of Ultrasonic flow meters for flow measurement. If you have any questions, please contact our sales engineers.

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Ultrasonic Flow Meters

Features of Handheld Ultrasonic Flow Meter

High precision measurement
- Measurement accuracy is better than ±1%, linearity is 0.5%, repeatability is 0.2%
Small size and light weight
- Volume: 210 × 90 × 30mm, the host weight is only 0.5kg
Non-contact measurement
- The magnetic flow ultrasonic sensor is adsorbed on the outer wall of the pipe to complete the flow measurement.
Large measuring range
- Measurement of pipe flow from DN20 to DN2000 with different types of sensors
Charger
- Built-in large-capacity nickel-metal hydride rechargeable battery to support continuous operation of the flowmeter for more than 12 hoursLarge screen
LCD display
- It can display cumulative flow, instantaneous flow, flow rate, working status, etc. at the same time.
Built-in data logger
- Built-in data logger with a space of 24K bytes and can store 2000 lines of measurement data.

Specifications of Handheld Ultrasonic Flow Meter

Items	Performance and Parameter
Main Unit	Principle	transit-time ultrasonic flowmeter
	Accuracy	Accuracy :over 1%-2%; Repeatability: over 0.2%
	Display	4 line x 16 character LCD with backlight
	Dimension	2009333cm: 390g
	Operation	Support 16 key light touch keyboard and the Simulation keyboard software
	Data interface	Insulate RS232 serial interface, upgrade the flew meter software by computer, support the MODBUS, etc.

	Signal Output	1 way OCT output
Special Cable	Twisted-pair cable ; Select the RS232 communication.;
	Generally, the standard is 5m2, optional 10m2
Pipe Condition	Pipe Material	Steel, Stainless steel, Cast iron, Copper, Cement pipe, PVC, Aluminum, Glass, steel product, liner is allowed.

	Pipe Diameter	DN 15—6000mm
	Straight length pipe	Transducer installation should be satisfied: upstream10D, downstream 5D, 30D from the pump.

Measuring Medium	Type of Liquid	Water ; Ultra-pure liquids; Solvents and other liquids
	Temperature	Standard Transducer: -30–90℃; High-temperature transducer: -40–160℃
	Turbidity	under 10000ppm and less bubble
	Flow rate	0–±10m/s
	Flow Direction	Measuring two (plus-minis) direction of flow rate
Working Environment	Temperature	Main Unit: -20–60℃ Flow transducer: -40–160℃; Temperature transducer: according to the customer’s demands.


	Humidity	Main Unit: 85% RH
Power Supply	AC 110V-240V

Optional Transducer

Handheld Ultrasonic Flow Meter packaging 3.png

Guess You’ll Like: Ultrasonic flow meters types & technical guide

Featured Clamp-on ultrasonic flow meters

Handheld Ultrasonic Flow Meter is a commonly used clamp-on ultrasonic flow meter.

Clamp-on ultrasonic flow meter mainly refers to the installation form of the ultrasonic sensor. The sensor clamp is fixed outside the pipe.

Clamp-on ultrasonic flow meters can be handheld, wall-mounted, and portable with printing functions depending on the host. You can select different hosts according to your measurement needs.

Typical Applications of Handheld Ultrasonic Flow Meter

The handheld ultrasonic flow meter is mainly used for flow measurement of industrial pipeline fluids, and is widely used in environmental protection, petrochemical, metallurgy, paper-making, food, pharmaceutical and other industries.

The SI-2000H ultrasonic flow meter is ideal for flow testing during test and balance.

It is also useful for temporary flow monitoring, in existing systems to establish baseline demand data.

Water (hot water, cooling water, potable water, seawater, etc.)
Petroleum products
Chemicals, including alcohol, acids, etc
Beverage, food, and pharmaceutical processors
Secondary sewage, waste treatment, etc.
Power plants, Metallurgy, and miming applications
Pipeline leak detection, inspection, tracking, and collection

Of course, if you are allowed to install a pipe segment flowmeter in your measurement pipeline, you may consider the use of an electromagnetic flowmeter. Electromagnetic flowmeters will provide more accurate measurements.

For example, if you need to measure the wastewater flow of a 2-inch pipe, then you can refer to: Magnetic Flow Meters Guides.

Handheld Ultrasonic Flow Meter Installation

Handheld Clamp on Transducers

Install the clamp on transducer (with magnet) on the pipe, can finish the flow measurement. No pressure drop, no need cut off pipe.
Several types transducers for selection, measuring pipe size from DN25-DN6000mm.
Several types transducers for selection.

Clamp on Mounting Bracket Transducers

Bracket transdcuer can simplify the ultrasonic flow meter installation process. Shorten installation time and improve installation accuracy.
Install the clamp on bracket transducer （with magnet） on the pipe. Can finish the flow measurement. No pressure drop, no need cut off pipe.
Several types bracket transducers for selection, measuring pipe sizing from DN25-DN700mm.
Several types bracket transducers for selection, measuring temperature range -30℃ to 160℃.

Check more Choosing The Right 1 Inch Flow Meter.

Portable ultrasonic flow meter for water

Ultrasonic flowmeter is especially suitable for measuring large-diameter liquid pipelines because of its measuring principle. It has a large number of applications in urban water supply and sewage treatment industries. And the measurement results are very good.

Water is often used as circulating water in industrial production. That is, the water that can be recycled as the carrier of heat in the production process of the enterprise. The beginning is a circulating pool with a cooling system, and the end is the heat exchange equipment of the production workshop.

There are many types and quantities of heat exchange equipment in biochemical companies, so the circulating water pipelines are complicated. If a flow meter is installed on each circulating water pipeline, it will be a considerable expense.

Therefore, most production companies do not install flow meters for circulating water pipes in the initial stage of design to reduce investment costs. However, in order to grasp the operating efficiency of all heat exchange equipment in the production process, it is necessary to detect the flow rate of the circulation in the pipeline. .

An ultrasonic flowmeter can be used as a standard meter to transmit the value. It not only protects water resources rationally and scientifically, but also quantifies the paid use of water resources to a great extent. At the same time, it also protects the interests of both parties who use the water and reduces the cost of enterprise inspection. This makes periodic verification of large-caliber water flow meters a reality.

Handheld ultrasonic flow meter manual:

Handheld-Ultrasonic-Flow-Meter Download

The measurement accuracy of the ultrasonic flowmeter is very high. Almost no interference from various parameters of the measured medium. In particular, it can solve the flow measurement problems of strong corrosive, non-conductive, radioactive and flammable and explosive media that other instruments cannot.
So what causes the inaccurate measurement of the ultrasonic flowmeter? The following are the reasons for the inaccurate measurement:
The influence of pipeline parameter equipment on the accuracy of ultrasonic flowmeter measurement.
The influence of upstream and downstream straight pipes on the accuracy of ultrasonic flowmeter measurement.
The influence of couplant on measurement accuracy.
The influence of the installation position of the ultrasonic flowmeter transducer on the measurement accuracy.

Common types of ultrasonic flow meters
①According to the measurement principle. Ultrasonic flowmeters are now the most commonly used methods for measuring flow rates are the propagation velocity difference method ultrasonic flowmeter and the Doppler frequency shift method ultrasonic flowmeter. The propagation velocity difference method can be divided into three types: time difference method, phase difference method and acoustic cycle frequency difference.
②According to the installation method of the transducer. There are two types of ultrasonic flowmeters: fixed ultrasonic flowmeter and portable ultrasonic flowmeter.
The transducer installation methods of the fixed ultrasonic flowmeter can be divided into:
A tube-segment ultrasonic flowmeter integrating transducer and measuring tube;
The external clamp ultrasonic flowmeter with the transducer clamped on the outer wall of the measuring tube;
Plug-in ultrasonic flowmeter in which the transducer passes through the outer wall of the pipe and directly contacts the medium;
The transducer is attached to the inner wall of the large pipeline ultrasonic flowmeter.
③According to the channel of propagation. Ultrasonic flow meters can be divided into single-channel ultrasonic flow meters and multi-channel ultrasonic flow meters. Among them, multi-channel can be divided into two-channel ultrasonic flowmeter, ultrasonic flowmeter, four-channel and eight-channel ultrasonic flowmeter.
Extended Reading: Inline Ultrasonic Flow Meter

Ultrasonic flowmeters use sound waves to determine the velocity of a fluid flowing in a pipe.
At no flow conditions, the frequencies of an ultrasonic wave transmitted into a pipe, and its reflections from the fluid are the same.
Under flowing conditions, the frequency of the reflected wave is different, due to the Doppler effect.
When the fluid moves faster, the frequency shift increases linearly.
The transmitter processes signals from the transmitted wave, and its reflections to determine the flow rate.
Extended reading: Ultrasonic flow detectors types

More Featured Liquid Flow Meters

Frequently
Asked
Questions

Help Center

Portable Ultrasonic Flow Meter is a handheld ultrasonic flow meter. The clamp-on sensor is used to measure liquid flow in industrial pipelines.

The portable ultrasonic flowmeter uses a non-invasive sensor to measure liquid flow. The installation process is extremely simple. There is no need to destroy the pipeline during the measurement process and no need to stop production. The sensor is not in contact with the measured medium. Battery powered, small size, light weight and easy to carry. Realize the real sense of mobile flow measurement, online detection, is a real sense of portable ultrasonic flowmeter.

Generally speaking, mass flow meters are relatively accurate.
Of course, the accuracy of the flowmeter still depends on the site conditions.
If the measurement of temperature and pressure is not very difficult, the accuracy of the flowmeter must be relatively high.
In addition, to ensure the accuracy of the flowmeter, correct installation and use are also very important.

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Sino-Inst, Manufacuturer for Handheld Ultrasonic Flow Meters. It can measure a single sound-conducting liquid medium of DN 15—6000mm. It can measure even liquids such as water, sea water, oil, and slurry.

Sino-Inst’s Handheld Ultrasonic Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

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KimGuo11

drurylandetheatre.com

Features of Clamp-on Ultrasonic Gas Flow Meter

Specifications for Clamp-on Ultrasonic Gas Flow Meter

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Frequently
Asked
Questions