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:

Gas Thermal Mass Flow Meter

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Thermal Mass Flow Meter

What is a Thermal Mass Flow Meter?

Thermal Mass Flow Meter, also called calorimetric flow meter, is an instrument that measures gas flow based on the principle of thermal diffusion. When the fluid passes through a pipe heated by a heat source, the temperature field will change. The thermal mass flow meter uses this The fluid flow rate is measured based on the change or the relationship between the energy required to increase the fluid temperature and the fluid mass. Generally used to measure the mass flow of gas. It is widely used in many industrial fields.

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Figure 1. Simplified thermal gas mass flow meter-suitable for pipe diameters above DN80 and below DN500
Figure 2. Full-tube thermal gas mass flowmeter-suitable for pipe diameters above DN15 and below DN80
Figure-3.-Standard thermal gas mass flow meter (special models need to be customized)-suitable for pipe diameters above DN80 and below DN4000
Figure 4. Flange plug-in gas mass flow meter
Figure-5.-Simplified-split-display-gas-mass-flow-meter
Figure-6.-Flange-mounted-gas-mass-flowmeter

Thermal mass flow meter specification

DescriptionSpecifications
Measuring MediumVarious gases (Except the acetylene)
Pipe SizeDN10～DN4000mm
Velocity0.1～100 Nm/s
Accuracy±1～2.5%
Working TemperatureSensor: -40℃～+220℃
Transmitter: -20℃～+45℃
Working PressureInsertion Sensor: medium pressure≤ 1.6MPa
Flanged Sensor: medium pressure≤ 1.6MPa
Special pressure please contact us
Power SupplyCompact type: 24VDC or 220VAC, Power consumption ≤18W
Remote type: 220VAC, Power consumption ≤19W
Response Time1s
Output4-20mA (optoelectronic isolation, maximum load 500Ω), Pulse,
RS485 (optoelectronic isolation) and HART
Alarm Output1-2 line Relay, Normally Open state, 10A/220V/AC or 5A/30V/DC
Sensor TypeStandard Insertion, Hot-tapped Insertion and Flanged
ConstructionCompact and Remote
Pipe MaterialCarbon steel, stainless steel, plastic, etc
Display4 lines LCD
Mass flow, Volume flow in standard condition, Flow totalizer, Date and Time, Working time, and Velocity, etc.
Protection ClassIP65
Sensor Housing
Material		Stainless steel (316)

Thermal mass flow meter advantages and disadvantages

Pros

  1. No need for temperature and pressure compensation for gas flow measurement. Convenient and accurate measurement;
  2. Wide range ratio, can be used for gas leak detection;
  3. Measuring flow rate range: 0.1Nm/s～100Nm/s.
  4. Good seismic performance and long service life, free from the influence of vibration on measurement accuracy;
  5. Overall digital circuit measurement, accurate measurement and convenient maintenance;
  6. Using RS-485 communication, factory automation and integration can be realized. click for inqueries
  7. No pressure loss, suitable for pipes of any shape with known cross-sectional area.
  8. Corrosion-resistant sensor, suitable for measuring corrosive gas.
  9. It is especially suitable for large-caliber measurement to ensure the accuracy of measurement and is suitable for trade settlement.
  10. The amount of construction is very small. Due to the plug-in structure, it can be installed and maintained online.
  11. The base-type instrument can display on-site and control with alarm.

Cons

  1. The thermal mass flow meter responds slowly.
  2. Places where the measured gas composition changes greatly. Due to changes in the cp value and thermal conductivity, the measured value will vary greatly and cause errors.
  3. For small flow, the meter will bring considerable heat to the gas to be measured. 　
  4. For thermally distributed thermal gas mass flow meters, if the measured gas deposits a scale layer on the pipe wall, the measured value will be affected. Must be cleaned regularly. The thin tube type instrument has the disadvantage of being easy to be blocked, and it cannot be used under normal circumstances.
  5. The use of pulsating flow will be restricted.
  6. Thermal mass flow meters for liquids are also restricted in the use of viscous liquids.

Thermal mass flow meter applications

The thermal measuring principle is widespread in the industry, and is being used successfully in many applications with gas flow, for example:

  1. Gas flow measurement in steel plants and coking plants;
  2. Boiler air flow, measure secondary air volume;
  3. Measurement of flue gas flow from chimney;
  4. Measurement of waterfall gas flow in water treatment;
  5. Gas flow measurement during the production process of cement, cigarette and glass factories;
  6. Compressed air flow measurement;
  7. Gas flow measurement of natural gas, coal gas, liquefied gas, torch gas, hydrogen and other gases.
  8. Carbon dioxide (for beverage production and chilling)
  9. Argon (in steel production)
  10. Nitrogen and oxygen (production)
  11. Natural gas (for burners and boiler feed control)
  12. Air and biogas measurement (e.g. in wastewater plants)
Applications of Thermal Mass Flow Meter

Thermal mass flow meter for liquids

Generally, Thermal mass flow meters produced in China are used to measure gas mass flow.

If you need to measure liquid mass flow. Please contact our sales engineer. We will provide you with detailed product recommendations.

Thermal mass flow meter installation

insertion mass flow meter:

  1. Position determination: Keep away from elbows, solenoid valves, and other parts to ensure a stable flow field;
  2. Welding of the welding base: drill a Φ22 round hole in the pipe, and weld the welding base;
  3. Install the instrument: put the locking head into the probe rod during installation, and tighten it with a wrench after confirming the insertion depth;
  4. It is recommended that the user adopt a continuous flow ball valve when selecting the model, which is easy to disassemble. Especially in the medium place that is harmful to the human body.
  5. In the caliber smaller than DN300, the insertion depth is 1/2D+15mm. In the DN300-DN1000 caliber, the insertion depth is 1/4D+15mm. Above DN1000, the insertion depth is 1/8D+15mm.

Pipe inline thermal mass flow meter:

  • Can be installed horizontally and vertically.
  • When installing, first weld the special flange to the front and rear straight pipe sections.
  • Then clamp the front and rear straight pipe sections, gaskets, and instruments with stud bolts and connect them into one.
  • Then install this component on the pipeline. When installing, pay attention to the direction marked on the instrument should be consistent with the direction of the fluid.

Note:

(1) The integrated plug-in type should be inserted into the axis of the pipeline to be tested, so the length of the measuring rod depends on the diameter of the measuring pipe. It should be stated when ordering. If it cannot be inserted into the axis of the pipeline, the manufacturer will provide calibration coefficients to complete accurate measurement.

(2) The one-piece full-tube type adopts the national standard GB/T9119-2000 and is produced in accordance with the GB/T9119-2000 standard. (Other standards will be implemented after consultation and confirmation with the manufacturer.)

Thermal Gas Mass Flow Meter PDFDownload

This measuring principle is based on the fact that heat is drawn from a heated body when a fluid flows past.

The thermal mass flow meter is a flow meter based on the principle of thermal diffusion.

That is when the fluid flows through the object, the amount of heat loss of the heat-generating object is proportional to the flow rate of the fluid.

SI-RSL Thermal mass flowmeters

Specifically, the flowmeter sensor has two standard RTDs. One for the heat source and one for measuring the temperature of the fluid.

When the fluid passes, the temperature difference between the two is nonlinear with the flow rate.

The meter can convert this relationship into a linear output, that measures the flow signal.

There are two design methods for the flowmeter manufactured, by the principle of thermal diffusion: one is based on the principle of constant temperature difference. The other is based on the principle of constant power.

Based on a common data model:

P / ▷ T = A + B (Q) N.

Among them:

P—dissipated power,

▷T—the temperature difference between the two sensors,

Q—mass flow,

N—exponential coefficient,

A, B is the coefficient related to the thermal performance of the gas.

The principle of constant temperature difference:

▷T remains unchanged, and the dissipated power P and the flow rate Q of the fluid are exponentially increasing.

Constant power principle:

The dissipated power is constant, and the temperature difference ▷T is in a decreasing relationship with the flow rate Q of the fluid.

Know more about How Thermal Mass Flow Meter Technology Works?

Video source: https://www.youtube.com/watch?v=YfQSf2NBGqc

Thermal meters require a fully developed flow profile as a prerequisite for correct flow measurement. For this reason, please note the following points when installing the device.

  • Observe the recommended inlet and outlet requirements.
  • Good engineering practice is necessary for the associated pipe work and installation.
  • Ensure correct alignment and orientation of the sensor.
  • Take measures to reduce or avoid condensation (e.g. install a condensation trap, thermal insulation, etc.).
  • The maximum permitted ambient temperatures and the medium temperature range must be observed.
  • Install the transmitter in a shaded location or use a protective sun shield.
  • For mechanical reasons, and in order to protect the pipe, it is advisable to support heavy sensors.
  • No installation in where large vibration exists.
  • No exposure in the environment containing a lot of corrosive gas.
  • No sharing power supply with frequency converter, electric welding machine and other machines which can make power-line interference. If necessary, please add power conditioner for transmitter power supply

The minimum recommendations for inlet and outlet runs (without flow conditioner) are:

Flanged sensor

1 = Reduction, 2 = Expansion, 3 = 90° elbow or T-piece, 4 = 2 × 90° elbow, 5 = 2 × 90° elbow (3-dimensional), 6 = Control valve.

Insertion sensor

1 = Reduction, 2 = Expansion, 3 = 90° elbow or T-piece, 4 = 2 × 90° elbow, 5 = 2 × 90° elbow (3-dimensional), 6 = Control valve or pressure regulator.

A specially designed perforated plate flow conditioner can be installed if it is not possible to observe the inlet runs required.

Extended reading: Gas mass flow controller working principle

Thermal mass flow meter and Coriolis flow meter are both flow meters used to measure fluid mass flow rate.

The thermal type can only be used in gases. It uses the different heat conduction and absorption capabilities of various gases to measure the heat transfer or heat energy loss from heating to induction to correspond to the flow rate.

Thermal Mass Flowmeters (Thermal Mass Flowmeters, TMF for short) are used to measure thermal flow meters in China. The fluid mass flow is measured by the temperature field change generated when the fluid flows through the pipe heated by the external heat source. Or a flow meter that uses the relationship between the energy required to increase the temperature of the fluid and the mass of the fluid when the fluid is heated to a certain value to measure the mass flow of the fluid. Generally used to measure the mass flow of gas.

Thermal Mass Flowmeters have the characteristics of low pressure loss; large flow range; high precision, high repeatability and high reliability; no moving parts and can be used for extremely low gas flow monitoring and control. Utilizes the heat (or temperature) of the heated fluid Changing the mass flow of fluids has a long history.

Read more about: Applications Of Digital Gas Mass Flow Meters

The usual mass flowmeter refers to Coriolis flowmeter. Use the Coriolis principle (the interference of the earth’s rotation on the curved material) to directly measure the mass of fluid flowing through. Can measure gas and liquid.

The volume of a fluid is a function of fluid temperature and pressure and is a dependent variable. The quality of a fluid is a quantity that does not change with time, space temperature, and pressure.

As mentioned earlier, the flow measurement values ​​of commonly used flow meters, such as orifice flow meters, turbine flow meters, vortex flow meters, electromagnetic flow meters, rotameters, ultrasonic flow meters, and oval gear flow meters, are fluid. Volume flow.

Extended reading: Fuel Flow Meter for Boat-Selection & Application

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Ultrasonic Gas Flow Meter – A series

FAQ

A thermal mass flow meter measures the flow of gas or liquid using heat. Think of it like this: it heats up a small part of the fluid and then checks how quickly the heat moves. Faster heat movement means more fluid is flowing.

Thermal mass flow meters are usually very accurate. They can give readings that are close to the actual flow. But, just like any tool, they can sometimes be a little off. It’s always good to make sure they’re set up right for the best results.

No, they’re not the same. A vortex flow meter measures how swirls or “vortices” are made when fluid flows past an object. A thermal mass flow meter, on the other hand, uses heat. So, they work in different ways. Read more about: vortex flow meter straight run requirement.

There are many good thermal mass flow meters out there. The best one depends on what you need it for. It’s a good idea to talk to someone who knows a lot about them or read reviews before buying one.

Sino-Inst offer over 10 Thermal Mass Flow Meters, with Best Price.

A wide variety of Thermal Mass Flow Meters options are available to you, such as free samples, paid samples. All of our flow meters can work with the AMS NEW TREX. 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 Thermal Mass Flow Meter supplier and Manufacturer, located in China. 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 Thermal Mass Flow Meter respectively.

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

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Industrial Magmeter Flow Meters

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What is a Magmeter Flow Meter?

Magmeter Flow Meters are also called Electromagnetic flow meters or magnetic meters. Magmeter Flow Meter is a type of volumetric flow meter. It is mainly used to measure high-precision flow measurements of various conductive fluids. Such as water-based liquids, mixed media such as mud and sludge can also be measured.

Magmeter Flow Meters are based on the principle of electromagnetic induction. We Sino-Inst offer a range of full-bore and insertion electromagnetic meters. Covering pipe diameters from DN6 to DN3000. Accuracy can reach 0.5%.

Contact us

Choose the Suitable Magmeter Flow Meters

Magnetic Water Flow Meter
Remote Magnetic Sewage Flow Meter
Insertion Magnetic Flow Meter
Magnetic Sanitary Flow Meter
Magnetic Stainless Steel Flow Meter
Magnetic Battery Operated Flow Meter
Magnetic Large Dia. Pipe Flow Meter
Magnetic High Pressure Flow Meter
Magnetic Open Channel Flow Meter

Advantages of Magmeter Flow Meters

  • Suitable for measuring two-phase flow containing suspended matter, solid particles, fibers, etc. Such as mud, sewage, ore pulp, pulp, and other viscous slurries.
  • It uses four electrodes and a built-in grounding electrode. It is used for non-conductive pipes without the need for additional electrical rings.
  • It also has 420mA current signal output, pulse output, and instantaneous flow upper and lower limit alarm outputs. RS485 communication and HART protocol are also available.
  • On-site display of instantaneous flow, percentage, flow rate, forward and reverse cumulative flow, and total cumulative amount.
  • The power supply mode can be selected from AC85V~AC220V or DC24V.
  • Daily reports, monthly reports, annual reports, power failures, and other functions can be queried with one click.
More Flow Meters

First, let us look at the structure of the magmeter.

The structure of electromagnetic flowmeter is mainly composed of magnetic circuit system, measuring catheter, electrode, shell, lining and converter.

The electromagnetic flowmeter is made according to Faraday’s law of electromagnetic induction. It is used to measure the volume flow of conductive liquid.

Faraday’s law of induction (referring to the induction of an electric potential inside the conductor when the conductor passes through a magnetic field) is the basic principle of electromagnetic flowmeter measurement.

This measurement principle can be applied to conductive fluids.

The fluid flows into a pipe whose magnetic field is perpendicular to the direction of the fluid, and the electric potential induced in the fluid can be measured using two symmetrically arranged electrodes.

The signal voltage UE is proportional to the magnetic induction intensity B, the electrode spacing D and the average fluid velocity v.

Because the magnetic induction intensity B and the electrode spacing D are constant. Therefore, the signal voltage UE is proportional to the average flow velocity v.

The equation used to calculate the volume flow rate shows that the signal voltage UE is linearly proportional to the volume flow rate.

The sensed signal voltage is converted into the graduation in the converter, analog and digital output signals.

Magmeter flowmeters measure the velocity of conductive liquids (such as water, acid, caustic and slurry) in the pipeline. When measuring deionized water, the minimum conductivity of the medium is 20uS/cm. For most liquids, the minimum conductivity required for measurement can be 5uS/cm.

Magmeter is mainly used in the following areas:

  • Measure clean water, sewage, domestic water, raw water;
  • Various acid, alkali, salt and other solutions;
  • Mud, mineral pulp, paper pulp, and food liquids, etc.;
  • It is widely used in metallurgy, papermaking, water treatment, chemical industry, light industry, textile, food and beverage, catering, agricultural irrigation, hydropower station, oil production, electric power and mining industries.

Extended Reading: Guide: Magnetic Flowmeter Installation

Magmeter liner selection should be selected according to the corrosiveness, abrasiveness and temperature of the measured medium.

  • Hard/soft rubber is resistant to general weak acid and alkali corrosion. Temperature resistance is 65℃. Soft rubber has abrasion resistance.
  • Polytetrafluoroethylene (PTFE) is almost resistant to strong acid and alkali corrosion except hot phosphoric acid. The temperature of the medium can reach 130℃. But it is not resistant to wear.
  • Polyurethane rubber has good wear resistance. But it is not resistant to acid and alkali corrosion. Temperature resistance is also poor. The medium temperature is less than 65°C.
Liner MaterialsFunctionsApplications
Hard rubber1. It is resistant to hydrochloric acid, acetic acid, oxalic acid, ammonia, phosphoric acid and 50% sulfuric acid, sodium hydroxide, and potassium hydroxide at room temperature.
2. Avoid strong oxidants. 		1, below 70℃
2. General acid, alkali, and salt solutions. 
Soft rubber1. It has good elasticity and good wear resistance;
2. It is resistant to the corrosion of general low-concentration acids, alkalis, and salt media, and is not resistant to the corrosion of oxidizing media. 		1. Below 70℃;
2. Measure general water, sewage, mud, ore slurry
Polytetrafluoroethylene (PTFE)
Modified polytetrafluoroethylene (PFA)		1. The material with the most stable chemical properties in plastics. It can withstand boiling hydrochloric acid, sulfuric acid, nitric acid and aqua regia, as well as strong alkalis and various organic solvents;
2. Poor abrasion resistance and adhesion. 		1.-40℃~+130℃C(PTFE),
-40℃~+160℃(PFA);
2. Strong corrosive media such as acid and alkali;
3. Sanitary media. 
PO1. It can withstand hydrochloric acid, acetic acid, oxalic acid, ammonia, phosphoric acid, sulfuric acid, sodium hydroxide, and potassium hydroxide at room temperature.
2. It can withstand concentrated alkali and various organic solvents. 		1. Below 70℃;
2. General acid, alkali, and salt solutions;
3. General water, sewage, mud, mineral slurry. 
CeramicsWear resistance, high temperature resistance, corrosion resistanceBelow 200℃

1.Environmental conditions:

Magmeter flowmeter, especially the flowmeter with intelligent LCD screen. The installation position should avoid direct sunlight as much as possible. The ambient temperature should be between 5℃~55℃.

2.Avoid strong interference sources

Choose a place where there is no strong electromagnetic field radiation to install the flowmeter.

Avoid devices that can easily cause electromagnetic interference, such as motors, transformers, and frequency converters.

The measurement principle of the flowmeter is based on Faraday’s law of electromagnetic induction, the original
The initial signal is very weak, less than millivolt.

If there is strong electromagnetic field radiation near the flowmeter, it will affect the accuracy of the measurement and even fail to work normally.

3.Magmeter straight run

Pay attention to avoid eddy current generating parts as much as possible. Such as various valves, elbows, bypasses, etc.

Try to extend the straight pipe section upstream and downstream of the flowmeter. Install a rectifier tube if necessary.

Ensure that the upstream straight pipe section of the flowmeter must be at least 5 DN (measurement pipe diameter). The downstream is guaranteed to be more than 2 DN.

4.The conductivity of the liquid must be uniform and stable

Do not install the flowmeter in a place where the conductivity of the fluid to be measured is extremely uneven.
If different media are injected upstream, the conductivity will be uneven and will affect the measurement.

In this case, it is recommended to move the injection port downstream.

If it must be injected from upstream, it should be as far away from the flowmeter as possible. Generally, it is better to keep a distance of more than 20 DN. To ensure that the liquid is fully mixed and uniform.

5.Keep the electrode axis level

The plane of the intermittent measuring electrode must be kept level. This prevents short-term insulation between the two electrodes due to air bubbles.

6.Magmeter grounding rings

Since the induction signal of the electromagnetic flowmeter is very weak, it is susceptible to noise. Therefore, the reference potential of the sensor and the converter must be the same as the measured liquid, and be grounded together.

The purpose of installing grounding rings or grounding electrodes on both sides of the electromagnetic flowmeter is to establish the equipotentiality between the flowmeter casing and the liquid.

Ordinary metal pipe (generally no need to install grounding ring)

When the pipeline itself is well grounded, the grounding wire can be omitted, but the casing must be connected to the liquid through the grounding wire equipped with the flowmeter.

Insulated pipes (plastic pipes, rubber-lined pipes, etc.)

A grounding ring (or grounding electrode) should be installed at both ends of the sensor and the measured medium should be short-circuited with the earth through the grounding wire.

Cathodic protection pipeline

The pipe flanges are connected by copper wires, but they must be insulated from the grounding wire.

Magnetic flowmeter is a widely used flow measuring instrument. How should we calibrate it?

Let’s take a look at the calibration method of electromagnetic flowmeter:

  1. Determine the corresponding water pump according to the pipe diameter and flow rate of the verification test;
  2. After the flowmeter is correctly installed and connected, it should be energized and preheated for about 30 minutes in accordance with the requirements of the verification regulations;
  3. If the high-level tank water source is used, check whether the overflow signal of the stabilized water tower appears. Before the formal test, use the verification medium to circulate in the pipeline system for a certain period of time. At the same time, check whether there is any leakage in the sealing parts of the pipeline;
  4. The verification medium should be filled with the electromagnetic flowmeter sensor before the formal verification. Then the downstream valve should be closed to adjust the zero position;
  5. At the beginning of the verification, open the valve at the front of the pipeline and slowly open the valve behind the electromagnetic flowmeter to adjust the flow at the verification point.
  6. During the calibration process, the flow stability of each flow point should be within 1% to 2%-flow method. The total amount law can be within 5%.
    • The temperature change of the verification medium should not exceed 1℃ when the verification process of a flow point is completed. It should not exceed 5℃ when the entire verification process is completed.
    • There must be a sufficiently high pressure downstream of the electromagnetic flowmeter to be checked to ensure that no flashing and cavitation occur in the flow pipeline;
  7. After the test, close the valve at the front end of the test pipeline. Then stop the pump to avoid emptying the voltage stabilization facility. At the same time, the remaining verification medium in the test pipeline must be vented and the control system and the air compressor must be closed.

Extended reading:
What is the K-factor in a flow meter?
Cryogenic Flow Meters|Liquid Nitrogen-Liquid Oxygen-LNG fluids

Magnetic flow meter pDF

Electromagnetic flowmeter ManualDownload

Frequently
Asked
Questions

Help Center

A Rotameter flow meter is a variable area flow meter based on float position measurement. It is suitable for liquid and gas volumetric flow measurement and control.

Read more: Rotameter flow meter working principle

All electromagnetic flowmeters need to be calibrated when they leave the factory. Each finished product needs to pass the calibration line inspection before leaving the factory.

It is to install the product on the assembly line. The front end adopts a strictly debugged standard table. A series of coefficients such as the diameter of the flowmeter, the damping coefficient, and the sensor coefficient of the electromagnetic flowmeter are set at the back end. To achieve the same flow rate as the standard meter.

If calibration is done on-site, it may generally be used to calibrate outside the sealed pipeline. Such as portable ultrasonic flowmeter. But the accuracy is generally 0.5. If you just check it, you can use a portable ultrasonic flowmeter.

Read more: Magnetic flow meter calibration

Ultrasonic flow meters and electromagnetic flow meters have different measurement principles.

Electromagnetic flowmeter must measure conductive liquid. The ultrasonic flowmeter can measure pure single-phase liquid. It has nothing to do with the conductivity of the liquid.

The electromagnetic flowmeter must be in contact with the medium to measure. The ultrasonic flowmeter can do contact and non-contact measurement.

The electromagnetic flowmeter is a flow measuring instrument. The measuring principle of the electromagnetic flowmeter is measured according to its principle of conduction. Most of the flow measurement on the market is solved by electromagnetic flowmeters.

The electromagnetic flowmeter is a pure liquid volume measurement instrument.

The mass flow meter is a function of fluid volume and fluid temperature and pressure. Is a dependent variable. The quality of a fluid is a quantity that does not change with time, space temperature, and pressure.

Mass flow meters are compared with electromagnetic flow meters. It can measure non-conductive media. This is one of the biggest differences. In addition, the accuracy of the mass flow meter is higher. The cost is large, and there are fewer applications in the market.

There is a big difference in the performance of general-purpose electromagnetic flowmeters on the market. Some have high precision and many functions. Some have low precision and simple functions.

The basic error of the instrument with high accuracy is (±0.5%～±1%)R.
The instrument with low accuracy is (±1.5%～±2.5%)FS.
The price difference between the two is 1 to 2 times.

Extended reading: Orifice Plate Flow Meter

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Magnetic flow meter manufacturers

Sino-Inst is one of the reliable Magnetic flow meter manufacturers and suppliers in China. Magnetic flow meters are applied for wastewater flow rate measurement.

Sino-Inst offer over 20 Magnetic flow meters, at the Best Price. A wide variety of Magmeters options are available to you, such as free samples, and paid samples.

About 40% of these are magnetic flow meters, 30% are Insertion Magnetic Flow Meter, and 30% are sanitary flow meters. Magmeters products are most popular in North America, the Middle East, and Eastern Europe.

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

Request a Quote

Please enable JavaScript in your browser to submit the form

Reliable Turbine Flow Meter Manufacturer

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Sino-Inst is a Turbine Flow Meter Manufacturer from China. Our turbine flow meters are widely used to measure liquid and gas flow in a variety of industrial, commercial and laboratory applications.

Sino-Inst offers turbine flowmeters for liquids, gases, and more. We can provide you with precision flow measurement solutions at the best price.

RFQ Turbine Flow Meters

Sino-Inst is a leading manufacturer of turbine flowmeters, providing a variety of instruments used in many industries. Including water treatment, food and beverage production, and pharmaceutical research.

We offer a range of products suitable for almost all applications. These include:

  • Water turbine flowmeter;
  • Diesel turbine flowmeter;
  • 304 SS and 316 SS turbine flowmeters with pulse or 4-20mA output;
  • Plastic material turbine flowmeter;
  • Low flow brass and 316 SS turbine flowmeter
  • Ultra-high pressure turbine flowmeter;
  • High temperature, extremely low temperature turbine flowmeter;
  • Gas turbine flowmeter, etc.

When you need reliable, accurate, and best-priced turbine flowmeters, Sino-Inst is your one-stop shop.

Featured Industrial Turbine Flow Meters

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Turbine Insertion Flow Meter
Turbine Sanitary flow meter
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Gas Turbine Flow Meter

Extended reading: High-quality hydraulic fluid flow meters

More Details About Turbine Flow Meter

A turbine flow meter is a type of flow meter that works by measuring the velocity of a fluid or gas as it passes through a turbine rotor. Turbine flow meters are commonly used to measure the flow of liquids and gases in a wide range of applications. They offer a high level of accuracy, especially in high flow rate applications, and can be used for both clean and dirty fluids. Turbine flow meters are also relatively easy to install and maintain, making them a popular choice in many industries.

Turbine flowmeter is composed of turbine, bearing, preamplifier and display instrument.

The principle of the turbine flowmeter is to place a turbine in the center of the pipeline, and the two ends are supported by bearings. As the fluid passes through the pipes, it strikes the turbine blades. Drive torque to the turbine. Make the turbine rotate by overcoming the friction torque and fluid resistance torque.

In a certain flow range, for a certain fluid medium viscosity, the rotational angular velocity of the turbine is proportional to the fluid velocity. Thus, the fluid flow rate can be obtained from the rotational angular velocity of the turbine, so that the fluid flow through the pipeline can be calculated.

The fluid to be measured impacts the turbine blades, causing the turbine to rotate, and the rotation speed of the turbine changes with the change of the flow rate. That is, the flow rate is large, and the speed of the turbine is also large. Then the rotation speed of the turbine is converted into electric pulses of corresponding frequency by the magnetoelectric conversion device. After being amplified by the preamplifier, it is sent to the display instrument for counting and display. According to the pulse number and cumulative pulse number per unit time, the instantaneous flow and cumulative flow can be calculated.

Turbine flow meters offer a number of advantages over other types of flow meters. Here are some of the key benefits of using turbine flow meters:

  • High accuracy: Turbine flow meters offer a high level of accuracy, especially in high flow rate applications. They have an accuracy of ±0.5% to ±1.0% of reading.
  • Wide flow range: Turbine flow meters have a wide flow range capability. They can measure flow rates from as low as 0.1 GPM (gallons per minute) to as high as 10,000 GPM, depending on the model and size.
  • Quick response time: Turbine flow meters have a fast dynamic response time, which means that they can measure changes in flow rate quickly.
  • Easy to install and maintain: Turbine flow meters are relatively easy to install and maintain. They don’t require a lot of space, and they don’t need a lot of external piping or support.
  • Versatile: Turbine flow meters can be used to measure the flow of a wide range of fluids and gases. Including hydrocarbons, chemicals, water, cryogenic liquids, air, natural gas, and industrial gases.
  • Customizable: Turbine flow meters can be customized to meet specific flow application requirements. Custom features may include: high temperature, extremely low temperature (-196 degrees Celsius), ultra-high pressure, extremely small diameter (DN4, DN6), etc.

Overall, turbine flow meters are a reliable and cost-effective method for achieving high accuracy flow measurement.

No, a rotary meter is a different type of flow meter than a turbine meter. While both are used to measure the flow of liquids or gases, they operate on different principles and have distinct designs.

A rotary meter, also known as a positive displacement meter, works by dividing the fluid or gas being measured into specific volumes and then counting the number of volumes that pass through the meter.

In contrast, a turbine flow meter works by measuring the velocity of the fluid or gas as it passes through a turbine rotor. The rotor spins at a speed proportional to the flow rate, and this motion generates an electrical signal that can be used to measure the flow rate.

While both types of flow meters are used for measuring the flow of liquids or gases, they are different in their operation and design.

As a Turbine Flow Meter Manufacturer- We Can Offer

Extensive customization services:

  1. Product brand OEM
  2. Product parameters customization:
    • Temperature, high temperature or low temperature liquid (liquid nitrogen, liquid oxygen, etc.);
    • Pressure, especially high pressure products, 16MPa, 25MPa, 32MPa, etc.;
    • Small flow, small diameter (DN4, DN6);
    • Signal output: pulse, 4-20mA, RS485, etc.;
    • Hygienic customization: optional 304 stainless steel, 316 stainless steel, clamp installation;
    • Connecting flange: Accept flange thread customization such as German standard DIN, American standard ANSI, and Japanese standard JIS.
  3. Last but not least. We can offer you the most reasonable price. The cheapest price is not necessarily the best product. Reference: DN50 Turbine Flow Meter Price, FOB Price USD 298.00/set.
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Industries & Applications We Serve

Sino-Inst is one of the reliable turbine flow meter manufacturers and suppliers in China. Of course, there are also many Leading Turbine Flow Meter Manufacturers in the international market. For example:

The turbine flow meters we supply from Sino-Inst include liquid turbine flow meters, gas turbine flow meters, etc. We can provide you with precision flow measurement solutions at the best price.

Sino-Inst’s turbine flow meters are made in China. Good quality and more favorable prices. Our flow measurement instruments are widely used in the United States, Indonesia, Singapore, and other countries.

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