Category Archives: Applications

Nitrogen Gas-Liquid Nitrogen Flowmeters

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Nitrogen Flowmeters are a type of flow meter that can measure the flow of nitrogen or liquid nitrogen. The common nitrogen flow rates are nitrogen and liquefied nitrogen. Nitrogen is often referred to as an inert gas. Used in metal processing in some inert atmospheres. When it is liquid, it is a common reagent for cooling, cooling, and freezing. Optimize your nitrogen system and save costs. Therefore, it is very important to accurately measure the nitrogen flow rate.

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Flow Measurement of Nitrogen

Nitrogen flowmeters are important to different industries. Inline Flow Measurement of Nitrogen needs to purchase the correct flow meter.

Please follow the purchasing guide below. You will find your most suitable Nitrogen flowmeter!

First, let’s take a look at nitrogen.

Flow Measurement of Nitrogen

Nitrogen is required in many processes of the chemical and pharmaceutical industry; predominantly as protective gas, to prevent the occurrence of explosive atmospheres。

Such as when handling dusty products or solvents.

If your work requires you to use nitrogen, having a flow meter installed on your tank is a great way to save some money.

These indicators let you know whether gas is moving through the line, often via the use of a levitating ball, a pressure gauge, or other visual cues.

These options are simple to use and reliable, making them must-haves for welders, HVAC technicians, and more.

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Next comes the most important question:

Nitrogen(N2) Flow Meter Types

There are many types of Nitrogen gas flow meters. There are three types of flow meters commonly used to measure nitrogen. Precession vortex flowmeter, gas vortex flowmeter, thermal gas mass flowmeter. When selecting a model, it is necessary to select a suitable model and specification according to the parameters and cost that can be provided on-site.

There are 6 types of commonly used nitrogen flow meters:

If you need to measure the volume flow (m3/h, dum/s), it is best to use a vortex flowmeter. The accuracy is quite high and the price/performance ratio is good. However, when measuring with a vortex flowmeter, pay attention to the measuring range.

The vortex flowmeter directly measures the volume flow of gas and liquid. It is necessary to add temperature and pressure measuring sensors and totalizers to calculate mass flow.

This is a new type of gas flow meter. The flowmeter integrates flow, temperature, and pressure detection functions. And can automatically compensate for temperature, pressure and compressibility. It is an ideal instrument for gas measurement in petroleum, chemical, electric power, metallurgy and other industries. It is also a common choice for nitrogen flowmeters.

For volume flow measurement, you can also use differential pressure flow meters, orifice flow meters, Verabar, and Annubar flow meters. However, the accuracy is lower and the price is higher. Its advantage is that it can measure the flow of gas-liquid two-phase media. For example, due to gas liquefaction or gas-liquid two-phase formation under high pressure.

Orifice plate flowmeter, orifice plate as a throttling element, equipped with a differential pressure transmitter. The volume flow can be calculated. To convert to mass flow, temperature and pressure sensors and totalizers must also be added.

Read more about: Inline gas flow meter

If it is a mass flow measurement, a gas mass flow meter can be used. Thermal gas mass flow meter directly measures the mass flow of common gases, including nitrogen.

Direct measurement of the mass flow of gas and liquid can be used to measure nitrogen, which is more expensive.

Extended reading: Liquid Mass Flow Meter

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.

The nitrogen flowmeter we designed is easy to use, reasonably priced, and fully functional. You can use our flow meters to measure compressed air, nitrogen, and industrial gases.

Extended reading: Gas Rotameter Tips

Of course, which type of nitrogen flowmeter to use. Please make further confirmation according to your actual needs.

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Extended reading: Cryogenic Flow Meters | Liquid Nitrogen-Liquid Oxygen

Featured Nitrogen Gas Flowmeter

There are 4 types of flow meters commonly used to measure the mass flow of nitrogen:

Thermal gas mass flow meter. Directly measure the mass flow of common gases, including nitrogen.

Coriolis mass flowmeter. Directly measure the mass flow of gas and liquid. It can be used to measure nitrogen, which is more expensive.

The vortex flowmeter directly measures the volume flow of gas and liquid. It is necessary to add temperature and pressure measuring sensors and totalizers to calculate the mass flow.

Orifice flowmeter. The orifice plate is used as a throttling element and is equipped with a differential pressure transmitter. The volume flow can be calculated. To convert to mass flow, temperature and pressure sensors and totalizers must also be added.

The above comparisons. Recommend thermal gas mass flow meter. The price is moderate, the installation and maintenance are simple, and the measurement is accurate.

Cryogenic Liquid Nitrogen Flowmeters

Liquid nitrogen refers to liquid nitrogen. Liquid with extremely low temperature. In industrial production, liquid nitrogen can be used as a deep refrigerant. The low-temperature turbine flowmeter is used as a liquid nitrogen flowmeter, which can work at a low temperature of -196°C (-320.8 °F).

Liquid Nitrogen FlowMeter’s Turbine sensor structure at ultra-low temperature (-196℃) is made of special customized material, and it is equipped with a low-temperature resistant amplifier. Realize the instantaneous and cumulative flow monitoring of liquid nitrogen.

  1. Nominal diameter:
    Common type (0.5～300) mm;
    Anti-corrosion type (6～100) mm
    Insertion type (80～600)mm
  2. Medium temperature:
    Ordinary type (-20～80)℃
    High temperature type (-20～120)℃
    Ultra-low temperature type (-196～80)℃
  3. Ambient temperature: (-20～55)℃;
  4. Accuracy: ±0.2%, ±0.5%, ±1%;
  5. Detector signal transmission line system: three-wire voltage pulse (three-core shielded cable);
  6. Power supply: voltage: 12V±0.144V, current: ≤10mA;
  7. Output voltage amplitude: high level ≥ 8V, low level ≤ 0.8V;

Gear flow meters are also a good choice for small-caliber liquid nitrogen measurement.

Gear flow transmitter is a type of positive displacement flow transmitter. It is a high-precision transmitter for measuring volume flow.

With the flow of the medium, the gears mesh and rotate. Under the action of the fluid flow, a pressure difference is formed at both ends of the instrument inlet and outlet. There is no need for a power supply. A pair of gears rotate freely. The cavity between the gears is filled with liquid. Discharge and measure the number of revolutions of the gear to know the flow of liquid and liquid flowing through the instrument.

  • High pressure resistance (1.0-45MPa)
  • High and low temperature resistance (-196℃-200℃)
  • Can measure various viscous media
  • High precision and repeatability
  • Pulse output/analog output optional
  • Wide range ratio (1:100)
  • Wide measuring range
  • Strong anti-corrosion and anti-fouling ability (acid and alkali)

Extended reading: liquid nitrogen level measurement

Case: Vortex flowmeter used for nitrogen gas flow measurement

The vortex flowmeter works according to the Karman vortex principle. Each pulse or certain current signal output by the meter represents a certain volume of the measured medium. The total number of pulses output during a period of time or the integral of the analog current quantity will represent the sum of the flow of the medium flowing in this period. That is, the instantaneous flow and cumulative flow we often say.

The vortex flowmeter measures a wide range of media, and it can measure gas, liquid and steam. It has a high working temperature and can withstand 350 degrees high temperature. No moving parts, safe and reliable measurement, no wear. The watch body is made of stainless steel, which is corrosion resistant and has a long service life.

Today we are mainly talking about the vortex flowmeter used for the measurement of nitrogen flow.
Give an example to illustrate:

A user measures nitrogen. The pipe diameter is 100mm. The usual flow rate is 950m3/h. Temperature and pressure.
The temperature and pressure of the site working conditions are not high. The flow rate is also within the measurable range of the vortex flowmeter.
It is understood that the user’s installation site environment is also better without major vibration or interference. Therefore, the user uses a nitrogen flowmeter, that is, a vortex flowmeter. The specific parameters are as follows:

  • Measuring medium: nitrogen
  • Medium temperature: normal temperature
  • Working pressure: normal pressure
  • Flow range: 120-1200m3/h
  • Connection method: flange pipe type
  • Installation direction: horizontal installation
  • Body material: 304 stainless steel
  • Sensor material: 304 stainless steel
  • Resistance body material: 304 stainless steel
  • Display mode: on-site LCD display
  • Power supply mode: 24VDC
  • Pressure rating: 1.0MPa

Vortex flowmeter functions:

  1. On-site LCD displays instantaneous flow and cumulative flow;
  2. Output 4-20mA signal output;
  3. The secondary instrument display can be selected, and it can be used in conjunction with PLC, DCS and other computer control systems;
  4. With temperature and pressure compensation, the accuracy is better;
  5. Can be connected to RS485 communication protocol;
  6. Optional battery power supply and power supply power supply;
  7. There are multiple connection options such as pipe type, plug-in type, threaded connection, and clamp type.

Features of vortex flowmeter:

  1. The nitrogen flowmeter has no moving parts, no wear, dirt resistance, no mechanical maintenance, and long service life;
  2. The overall structure design of the instrument is reasonable, the dynamic measurement range is wide, and the pressure loss is small;
  3. The measurement is not affected by temperature and pressure and is resistant to high temperatures. High pressure.

Vortex flowmeter installation conditions:

  1. There is a straight pipe section at 15-20D. Downstream straight pipe section 5-10D;
  2. Ensure that the medium is full of the pipeline;
  3. Try not to install it in a place with strong vibration or interference. If it must be installed in an environment with vibrations, shock absorption measures should be taken.

FAQ

Flow Metering Principles

  • 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 principles, 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

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. For example – the cost of flow meters increases with accuracy and lifetime quality.

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Sino-Inst is a well-known Exporter, Supplier, Trader, and Service Provider of Nitrogen flowmeters. Sino-Inst offers over 50 Nitrogen flowmeters for flow measurement. About 50% of these are differential pressure flow meters, 40% are the vortex flow sensor, and 20% are the gear flow meter and mass flow meter.

A wide variety of Nitrogen flowmeters 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.

Digital Water Flow Meters

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What is a digital water flow meter?

A Digital Water flow meter is a flow meter that can display the water flow rate, and have the output for the flow rate. Like 4-20mA output, HART, RS 485, and so on. Digital Water Flow Meter is also called Electronic Water Flow Meter. Digital Water Flow Meter is widely used in industrial water and household water measurement. Most of the Sino-Inst flow meters are digital water flow meters. Like the electromagnetic flowmeter, Portable ultrasonic flow meter, Turbine flow meter…..

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The water flow meter is an instrument specially used to measure the flow of water in pipes. You can get many different types of water flow meters from your facility.

When used in certain applications, each flow meter has its own advantages. For many pipelines and similar systems, the water must be maintained at a specified flow rate to ensure the effective operation of the system.

At low flow rates, the speed of the water may be so low that suspended solids settle to the bottom of the pipe, which will deteriorate the efficiency of the pipe and eventually lead to the accumulation of contaminants, which can cause damage.

Since water flow meters can be used in a wide range of applications, there are many reasons to need these flow meters.

On the one hand, knowing that the fluid is in the right place at the right time is very beneficial to ensure that operating costs and efficiency are maintained.

These meters can also be used to ensure that fluids are kept in motion or to determine if the tank is properly balanced.

Any drop in the flow rate may indicate that the water quality is deteriorating and requires treatment.

In some applications, accurate flow measurement is critical to product quality and the health and safety of the final product. These meters are relatively easy to install in the pipeline, depending on the type of meter you choose.

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Handheld Ultrasonic Flow Meter
Integral DP Flow Meter
Insertion Magnetic Flow Meter
Turbine Sanitary flow meter
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Vortex Steam Flow Meter
Gas Thermal Mass Flow Meter
T-series Triangle Coriolis Mass Flowmeter

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Water flow meter types

Water flow meters are flow meters that can diaplay the flow rate of industrial water pipe.

A water flow meter measures the amount of water flowing through a pipe. We have several kinds to choose from, depending on the application, maintenance needs, and budget.

Extended reading: 2 inch Water Flow Meter

There are four common water flow meter types:

Turbine (also called mechanical), Vortex, Ultrasonic, and Magnetic. We will tell you everything you need to know about them and help you choose one for your application.

First, you should know the flow meter working principles.

Flow Metering Principalples

  • Differential Pressure Flowmeters. Extended reading: Orifice Plate Flow Meter
  • Velocity Flowmeters
  • Positive Displacement Flowmeters
  • Mass Flowmeters
  • For Open Channel Flowmeters – weirs, flumes, submerged orifices, current meters, acoustic flow meters, and more

Read more about digital flow meters.

Types of water flow meters

Turbine/mechanical flow meter to measure water flow

Turbine flow meters easily become the most common flow meters around, mainly because these flow meters are more affordable than other types.

The mechanical flow meter measures the water flow through the rotation of the turbine, which uses a basic propeller, blade or split flow design. The flow rate of water is equal to the speed of the blades.

If mechanical flow meters are to be used, they may become clogged if the water is dirty or more contaminated than expected.

Therefore, you probably should not use this kind of flowmeter to measure the flow of slurry. Since these flow meters can become clogged, they are more frequently maintained than other flow meters.

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Vortex flowmeter measures water flow

The vortex flowmeter is a unique flowmeter that measures the flow of water by using vortex flow.

When the fluid pushes over the obstacle, it will produce a vortex and form a vortex. The flowmeter is equipped with a sensor tab. As long as the vortex flows through the sensor tab, the tab will bend, which will produce a frequency output indicating the flow rate of the water.

If you decide to choose a multivariable vortex flowmeter, it can measure up to five different variables that are useful for your specific application.

These variables include mass flow, temperature, density, flow rate and pressure. These meters are especially suitable for large pipelines.

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Ultrasonic flow meter to measure water flow

Ultrasonic flow meters are designed to use ultrasonic technology to measure the speed of water as it passes through the pipeline.

You should understand two basic types of ultrasonic flow meters, including runtime flow meters and clamp-on ultrasonic flow meters.

If you choose a run-time flow meter, send a standard ultrasonic signal downstream before sending another signal upstream. These two signals are then compared to determine the water flow rate. This is mostly a pipeline water flow meter. It is often used for household water.

For clamp-on ultrasonic flowmeters, can be placed outside the pipe and are designed to emit acoustic pulses through the pipe wall in order to receive the measured value. Since they can be installed outside the pipeline, they can be used for almost any application and can be used with larger pipelines.

Extended reading: Industrial VS Residential inline water flow meters

Electromagnetic flowmeter measures water flow

The electromagnetic flowmeter can measure the speed of water by using a simple magnetic field.

When water passes through a magnetic field, a voltage is generated. In this way, higher flow rates always generate more voltage when sent through the electromagnetic flowmeter. The electronic system connected to this meter will receive the voltage signal and convert it into volume flow.

Remember that the water needs ions to generate voltage, which means that the electromagnetic flowmeter cannot be used with pure water without pollutants.

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What is the difference between a flow meter and a water meter?

Flow meter usually refers to industrial flow meters. Water meter usually refers to residential water meter.

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Industrial VS residential digital water flow meter

1. From a functional point of view. Industrial digital water flow meter mainly measures instantaneous flow. It is a real-time state. It can understand the usage of each site. And can output pulses, 4~20mA, etc. Residential digital water flow meter is mainly a cumulative function, generally cannot see instantaneous flow .

2. From the cost point of view. The manufacturing cost of the Residential Digital Water Flow Meter is relatively low. The cost of an Industrial Digital Water Flow Meter is generally relatively high.

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3. In terms of quality. Relatively speaking, the Residential digital water flow meter has poor accuracy. It cannot withstand high pressure and high temperature, and cannot output linear signals. It cannot participate in the automation control of modern industry. The industrial digital water flow meter can do the above.

4. From the point of view of usage. Residential digital water flow meter only measures water and is not used to measure gas. And some liquid media water meters cannot be used. Industrial digital water flow meter liquids (water, oil, turbid liquids, etc.) can be measured.

Of course, Residential digital water flow meters can realize various functions such as prepayment. Remote data transmission. Remote valve control. Step water pricing, etc. It is a must-use metering product for residential homes.

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Ultrasonic Water Meter for Residential Water
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Strap on flow meter X3

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How do you measure the speed of the water?

Normally, like the Domestic water, industrial water, raw water, ground water, urban sewage, industrial wastewater, the processed neutral pulp, pulp slurry, etc.

We need to know the flow rate. We know the flow, we can analyze the water flow, control the flow, and so on.

For industrial water, most time is in the pipeline. Sometimes in the open channel.

  • For pipe flow measurement, we can install a flow meter on the pipe.
  • If the pipe can be changed, we can install a pipe flow meter or a flange to mount.
    • Electromagnetic flowmeters, turbine flowmeters, are all installed in this way.
  • If the pipe diameter is large, we can choose to install a plug-in electromagnetic flowmeter at a lower cost.
  • If the pipe cannot be changed, we can install the ultrasonic flowmeter, which is convenient and quick.
  • For open channel flow measurement, we can specialize open channel flowmeters. If you need to purchase an open channel flowmeter, you can contact us to customize it according to your requirements.

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Sino-Inst offers over 30 water flow meter products. About 50% of 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 water flow meter options are available to you, such as free samples, paid samples.

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

The top supplying country is China (Mainland), which supply 100% of the water flow meter respectively.

Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Water 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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Sewage Flow Meters

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Sewage Flow Meters- Wastewater Flow Meters

Sewage flow meter, also known as a wastewater flow meter. The sewage flow meter measures the flow of various sewages in pipes and open channels. Common sewage flow meters are magnetic flow meters, non-contact ultrasonic flow meters, etc.

Industries like wastewater, river water, industrial gas.

What is wastewater flow?

Sewage flow or wastewater can be a pain to accurately measure. The environment is corrosive and humid. While the flow itself can experience wide swings due to inflow and infiltration. Wastewater is usually carried in non-full open channel pipes.

So, all the flow measurement instruments suitable for Sewage flow are called Sewage flow meters, or wastewater flow meters.

Here you can find a Sewage flow meter to measure the flow of wastewater for your application.

Magnetic Water Flow Meter
Remote Magnetic Sewage Flow Meter
Magnetic Battery Operated Flow Meter
Magnetic Large Dia. Pipe Flow Meter
Handheld Ultrasonic Flow Meter
Clamp-on Ultrasonic Flow Meter
Insertion Magnetic Flow Meter
Ultrasonic Clamp-on Flow Meter

How is wastewater measured?

Magnetic flow meters

The electromagnetic flowmeter is based on Faraday’s law of electromagnetic induction. That is, the measured medium flows perpendicular to the direction of magnetic lines of force. Thus generating an induced electromotive force in a direction perpendicular to the flow of the medium and the lines of magnetic force.

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The induced electromotive force is proportional to the measured medium flow, and the instantaneous flow rate can be obtained by using the flow rate, and the cross-sectional area of ​​the pipe.

The conductivity in water is one of the prerequisites for the electromagnetic flowmeter to work properly.

The sewage contains a large number of impurities and salt and has a certain conductivity.

Therefore, the electromagnetic flowmeter can be used for sewage measurement.

For pure water, it cannot be measured with an electromagnetic flowmeter.

The advantages of the electromagnetic flowmeter are high precision, stable measurement and wide application range.

The electrode and the inner lining can be selected according to the medium, and can also be used for measuring work in a bad medium.

The disadvantage is that it is easily interfered by electromagnetic waves, and the diameter of the pipe is larger.

The more expensive the price, the larger the diameter of the electromagnetic flowmeter is not easy to disassemble, and the maintenance is difficult.

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Ultrasonic flowmeter

Ultrasonic Flow Meters

The working principle of the ultrasonic flowmeter (Best Guide to Ultrasonic Level Transmitter) is that, by means of the time difference measurement principle. A pair of ultrasonic probes transmit signals through the intermediate medium to the other side of the tube wall and are received by the other probe. And the other side of the probe also transmits a signal to be the first one.

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The probe is received. In this process, since the signal delivery time is affected by the medium flow rate, there is a certain time difference.

Based on this, the ultrasonic flowmeter calculates the corresponding flow value by means of the relevant formula.

In general, ultrasonic flow meters can be divided into two types: external clip type and plug-in type.

If the length of the straight pipe before the flowmeter does not meet the installation requirements, a multi-channel ultrasonic flowmeter can be installed.

Compared with the electromagnetic flowmeter, the installation of the ultrasonic flowmeter on the large diameter (especially the large diameter of 1 m or more) has obvious advantages, and the construction is not difficult, the cost is relatively low, and the maintenance is convenient.

The external clip-type ultrasonic flowmeter (Ultrasonic flow measurement) is easy to carry and install.

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Open channel flowmeter

Magnetic Partially Filled Pipe or Open Channel Flow Meter

Most of the sewage treatment plant sewage discharge methods are natural flow, that is, the flow of sewage in the pipeline or in the pipeline is not full.

A waterway that flows in such a non-full-tube state, that is, a waterway with a free surface, is called an “open channel.”

Even in the so-called “dark channel” waterway, since the liquid flows naturally, it also belongs to the open channel.

For such waterways, conventional pressurized full flow meters cannot be used when measuring flow.

The measured sewage contains various impurities and other organic chemical components.

Although it has been purified before the sewage is discharged, if a flow meter is used in direct contact with the sewage medium, scaling will inevitably occur inside the flowmeter after a long time.

Or the situation of being corroded, thus affecting the smooth progress of the measurement work.

The advantage of the open channel flowmeter is that the measuring range is large, and the flow measurement is not affected by the return of the tributary surface, the sediment in the water, the bubbles, and the water level. And the flow sensor will have resistance to the water flow, the structure is simple, the volume is small. And the installation is Convenience.

It is used in the Pearl River Delta area. The standard channels do not need to be modified, they can be installed directly, and the installation and construction costs are low. Therefore, it is suitable for measuring the discharge of sewage from sewage treatment plants.

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Cryogenic Flow Meters|Liquid Nitrogen-Liquid Oxygen-LNG fluids

Orifice flowmeter

Orifice Plate Flow Meter

The throttling flowmeter is a metering device, for metering flow that has been used in many previous years. It has the longest history and the most usage.

Nowadays, the common type is the circular orifice type and the tapered inlet plate type.

The working principle is to participate in the one-plate saving part in the fluid pipeline, and the pressure difference transmitter is introduced through the pressure guiding tube to measure the pressure difference between the upstream and the downstream of the saving piece.

According to the measured pressure difference, the instantaneous value of the flow is obtained by accounting.

Because of the inactivity of the water in the pressure guiding tube, in the colder area, the orifice tube of the outdoor equipment in winter is simply frozen (frozen), so that the differential pressure instrument cannot work normally.

When measuring dirty sewage, the orifice plate needs to be cleaned frequently.

If the cleaning is not timely, the measurement accuracy is reduced, and the pressure tube is often blocked by dirt, and the appearance cannot be used.

When the flow rate is measured by the orifice plate method, there are disadvantages such as large pressure loss and large protection amount.

Therefore, by changing the pressure-receiving method, for example, by using the radial pressure method, the influence of the fouling of the orifice plate can be reduced.

Widely used in environmental protection, metallurgy, chemical, pharmaceutical, water supply, food, paper, and other industries.

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Sewage Flow Meter Selection

Before you make the selection of sewage flow metering instruments.

According to the actual situation of the site and the comparison of different flowmeters:

  1. Electromagnetic flowmeter measurement stability, a wide range of applications, can measure a variety of media, but is susceptible to electromagnetic interference. As the diameter of the pipe increases, its price will become more and more expensive.
  2. Ultrasonic flowmeter has low cost, high measurement accuracy, stable operation, convenient installation and maintenance, and the price will not become higher and higher with the increase of pipe diameter, but it will become more and more expensive due to the increase of sound path.
  3. The open channel flowmeter has a wide measuring range, and the flow measurement is not affected by the change of the medium, but it is limited by the size of the measuring tank.

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Generally speaking, in the case of meeting the open channel installation conditions, the flow data is large, and the sewage flow can be transported through the open channel.

And the sputum flowmeter and the trough flowmeter are used for related operations.

In the actual measurement process, such equipment can meet the accuracy requirements of metering and save energy.

It uses a self-flowing method to transport sewage.

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Orifice Flow Meter

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Frequently
Asked
Questions

Help Center

Ultrasonic open channel flowmeters are used to measure flow in the sewer. In the case of a very small water flow, it can be matched with a triangular weir. Its basic structure is to install a weir groove at the outlet of the pipeline, which can be fixed with expansion screws. Finally, use structural glue to plug the surrounding gaps. Ensure that water does not seep from the place where the weir trough and the outlet pipe are connected.

As for how to install the ultrasonic open channel meteor on the weir trough, it is the same as usual. It’s just that the sewer may require battery power. It also needs to be equipped with a wireless RTU. This is also a way to measure the flow in a water channel when the water flow is very small.

Extended reading: Sludge flow meter for sewage treatment return activated sludge system

For the selection of sewage flow meters, various flow meters have their own advantages and disadvantages. In the process of sewage treatment, selection should be made according to actual needs.

The electromagnetic flowmeter is stable in measurement, has a wide range of applications, and can measure a variety of media. But it is easily interfered by electromagnetic waves. As the pipe diameter increases, its price will become more and more expensive.

Ultrasonic flow meters have relatively low cost and high measurement accuracy. run smoothly. Installation and maintenance are convenient, and the price will not increase with the increase of pipe diameter. But it will become more and more expensive because of the increase in sound channels.

The open channel flowmeter has a wide measurement range, and the flow measurement is not affected by changes in the medium. , But it is restricted by the size of the measuring tank. Generally speaking, when the installation conditions of open channels are met, the traffic data is large. Sewage flow operations can be transported through open channels. Weir flow meters and trough flow meters are used for related operations.

Extended reading: sludge level measurement

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

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Sino-Inst offers sewage flow meter products. About 85% of these are Magnetic flow meters, 3% are Ultrasonic water meters. A wide variety of sewage flow meter options are available to you, such as free samples, paid samples.

The top-selling countries or regions are China, India, and Israel, which supply 99%, 1%, and 1% of sewage flow meter respectively. Sewage flow meter products are most popular in Domestic Market, Mid East, and North America. You can ensure product safety by selecting from certified suppliers, with ISO9001, and Other certifications.

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Industrial flow meters

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Flowmeters for Industrial Flow Measurement

The industrial flow meter is one of the most important instruments in industrial measurement. In industrial sites, instruments that measure fluid flow are collectively referred to as flow meters or flow meters. There are very many kinds of flow meters. Based on years of experience, Sino-Inst has compiled the following information. Hope it can help you choose the right industrial flow meter.

RFQ
Digital Flow Meters

Flow Measurement is the process of measuring fluid in your plant or industry. Sino-Inst offers industrial flow meters, with local LCD reading, transmitter, and optical set points. You can measure flow through a variety of different devices, such as Coriolis, differential pressure, vortex, magnetic, ultrasonic, turbine, and positive displacement meters. Industries like: gas flow, airflow, wastewater ( sewage ), pipe (like 4 inches), and etc.

If you need to know the flow rate in you pipe, or river, that when you need a flow meter. So, flow meter is the instrument that can finish the flow measurement.

Flowmeters consist of a primary device, transducer and transmitter.

The transducer senses the fluid that passes through the primary device.

The transmitter produces a usable flow signal from the raw transducer signal.

These components are often combined, so the actual flowmeter may be one or more physical devices.

Different types of flow meters are available for different applications, and depending upon the requirement, a careful selection of flow meters is made.

For e.g., we prefer vortex flow meters to flow steam flow measurement. And we like the ultrasonic flow meters for non-contact pipe flow measurement.

Industrial flow meters Types

Magnetic Flow Meters

Magnetic flow meter is also called electromagnetic flow meter, mag flow meter or magmeter. Suitable for the measurement of conductive liquids.

Turbine Flow Meters

Turbine flow meters are velocity flow meters, also called impeller flow meters. Used to measure the instantaneous flow and cumulative flow of liquids and gases.

Vortex Flow Meters

Vortex flow meter, also called Vortex shedding flow meter. Vortex Flow Meter is suitable for flow measurement of steam and various liquids and gases.

Precession Vortex Gas Flowmeter

Precession vortex flowmeter is a new type of gas flowmeter. It can be used for the measurement of natural gas, propane, air, nitrogen and other gases.

Ultrasonic Flow Meters

The ultrasonic flow meter measures the liquid flow rate quickly and effectively. There are two types of ultrasonic flowmeter technology: Doppler frequency shift and transit time.

Ultrasonic Gas Flow Meters

Ultrasonic Gas Flow Meter uses the principle of measuring the transit time of ultrasonic waves in the pipeline. Ultrasonic Gas Flow Meter is an ideal choice for various gas measurements.

Differential Pressure Flow Meters

Differential Pressure Flow Meter is also called DP flow meter. Differential pressure flow meters use the principle of differential pressure to measure the flow of liquid, gas and steam.

Volumetric Flow Meters

Volumetric Flow Meter, as a mechanical flow meter, is also called Positive displacement flowmeter. It can measure the volume flow of high viscosity and corrosive fluids.

Mass Flow Meters

Mass flow meter directly measures the mass flow of the medium passing through the flow meter. It can also measure the density, temperature and viscosity of the medium.

INDUSTRIES

Sewage flow meter, also known as waste water flow meter. The sewage flow meter measures the flow of various sewages in pipes and open channels. Common sewage flow meters are magnetic flow meters, non-contact ultrasonic flow meters, etc.

Industries like the waste water, river water, industrial gas.

Read more about: Sewage Flow Meters

The air conditioning system is a control system that includes temperature, humidity, air clarity and air circulation, and is called HVAC (: Heating, Ventilation, Air-conditioning and Cooling).

The principle is similar to that of an air conditioner supplying cool air, heating air or dehumidification. The use of refrigerant under the action of the compressor. Produces evaporation or condensation. Then trigger the evaporation or condensation of the surrounding air, in order to change the purpose of temperature and humidity.

Air mass flow meter & Controller is commonly used in HVAC industry.

Read more about:

Air mass flow meter VS Controller

Digital air flow meters

A chilled water flow meter refers to a flow meter that can be used to measure low-temperature water. Common chilled water flow meters include electromagnetic flow meters, turbine flow meters, and ultrasonic flow meters. Used in the condensing system, chiller, or HVAC.

Read more about: Chilled Water Flow Meter

Clean Water can be measured using a variety of flow meters. Commonly used are electromagnetic flow meters and ultrasonic flow meters, etc.

Read more about:

Extended reading: Industrial Magmeters

The irrigation flow meter is a flow meter designed for agricultural irrigation water counting. Agriculture, horticulture, etc. require water for irrigation. And water is becoming more and more expensive. The installation of flow measurement devices allows for effective monitoring and management of agriculture water systems.
The old mechanical water meters and today’s ultrasonic flow meters and electromagnetic flowmeters are widely used.

Read mroe about: Irrigation Flow Meters for Agriculture Water System

Industrial oil flow meters measure the volume or mass of oil. Can realize the mutual conversion of volume and mass.

The main industrial oils are hydraulic oil. Gear Oil. Turbine oil. Compressor oil. Refrigeration oil. Transformer oil. Cylinder oil, heat treatment oil, heat transfer oil, etc. Of course, edible oil can also be produced in the industry. In addition, there are greases with lubricating oil as base oil and thickening agent.

Therefore, whether it is a company that uses, trades, or produces oil, it needs to accurately measure the oil flow.

There are many common oil flow meters, such as turbine flow meters, positive displacement flow meters, gear flow meters, mass flow meters, etc.

Read more about:

Industrial Oil Flow Meters

Hydraulic Oil Flow Meters

Diesel Fuel Flow Meters

Chemical flowmeters are used to measure flow rate that flow through them. You may often hear about ultrasonic flow meters, electromagnetic flow meters, turbine flow meters, volumetric flow or mass flow. Chemical flow meters are common in industries like petrochemical plants and refineries. And play a vital role in the manufacturing process since they help to enhance manufacture efficiency.

Read more about: Chemical Flow Meter Guide

Common sanitary flow meters are sanitary magnetic flow meter and sanitary turbine flow meter. Composed of 304/316 stainless steel. Sanitary flowmeter with Tri-Clamp fittings is easier to install and disassemble. Suitable for food hygiene industry.

Read more about:

Sanitary Flow Meters for Sale

Digital Beer Flow Meters

Marine fuels mainly include light diesel, heavy diesel, fuel oil, and residual fuel oil.

To put it simply, if the tested marine fuel is a low-viscosity, clean fuel. Then you can choose a turbine flowmeter. The price is reasonable and the measurement is stable.

If the marine fuel being tested is heavy oil, high-viscosity fuel. Then it is recommended to choose an oval gear flowmeter.

If the measured marine fuel is a small flow rate. Then it is recommended to use a circular gear flowmeter for measurement.

If the tested marine fuel has impurities. It is recommended to install a filter before the flowmeter.

If you still do not know how to choose the right marine fuel flow meter. You can contact our sales engineer. We will provide you with a suitable marine fuel flow measurement program.

Read more about:

Large-diameter Oval Gear-Marine Fuel Flow Meter

Industrial petrol flow meters|Selection Guide

The hydraulic flow meter is mainly for inline hydraulic system instantaneous flow test and high-pressure test. Industrial Hydraulic oil flow meter, also called hydraulic flow gauge.

Sino-Inst offers Turbine, Mass flow, Oval gear, V-cone, Target, and Orifice flow meters for inline hydraulic oil flow. Features like: bidirectional, high pressure, analog, can be customized as customer need

Read more about:

Hydraulic Oil Flow Meters

Commonly used Cryogenic Flow Meters include cryogenic turbine flow meters, orifice flow meters, mass flow meters, target flow meters, etc. Representative cryogenic fluids include LNG (liquefied natural gas), LN2 (liquid nitrogen), LO2 (liquid oxygen), liquefied ethylene, liquid hydrogen, liquid chlorine and these cryogenic gases. LPG (liquefied petroleum gas) is not included in the cryogenic Fluid.

Read more about:

Cryogenic Flow Meters for Sale

Refrigerant Flow Meter

Read more about: Beginner’s Guide: Variable area flow meter

Application of flow meter in industry

Selecting the right industrial flow meter for your application can be a challenging task. To make it easy, Sino-Inst recommends the best flow meter you should use for your particular gas, liquid, or steam flow application. First, choose your application:

  • Natural gas
  • Compressed air measurement
  • Gas mixing and blending applications
  • Burner control
  • Liquid measurement
  • Steam flow measurement

Based on your application specifications, such as flow rate, pipe size and gas measured, we help you select the perfect flow meter solution for your industry,to improve quality and save money on energy costs, installation, and maintenance.

Extended reading: Ultrasonic Insertion Flow Meter for Lined/Large Pipes

Sino-Instrument is a leading supplier of industrial flow meters, with experience in the design and application of various flow technologies.

To request a quote for industrial flow meters for your application, contact us for more information.

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Water Pressure Transducers

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Pressure Transducers and Water Pipe Pressure Measurement

Water pressure transducers also called a water pressure sensor,
are pressure transmitters that can measure water pipe pressure.

For the water level/water depth measurement,
in the tank, or in the well, we can use electrical transmitters, stainless steel body, IP65-IP6, 4-20ma output.

Sino-Inst applies application expertise to design and manufacture pressure sensors and transducers for the water industry.

Various factors impact the selection and long term use of water pressure sensors and transducers, in residential, commercial, and irrigation systems.  

Sino manufactures various products with design features, to offer excellent accuracy and long term stability.

Below is some basic information to review, before making a decision on the type of pressure sensor technology, as well as the electrical and mechanical features required.

Sino-Inst also offers pressure transmitters with 0-5V/0.5-4.5V, just contact us now.

Water Compatibility

WATER PRESSURE SENSORS

A pressure sensing element will come in contact with varying pH levels, depending on the type of water, chemicals added, and the quality of the water purification process.

Sino packages pressure sensors using silicon strain gages, mounted onto a one-piece, 316L stainless steel sensing element.

316L SS offers excellent media compatibility for residential, and commercial water applications and is an NSF61 compliant material.

Environment

Rain, ice, dust, and pressure washers can cause water to seep into sensor housings, and cause the electronics to short.

Sino offers sealed gauge reference pressure sensors to protect the electronics from these conditions.

Electrical Isolation

Improper grounding and lightning strikes can cause electrical failures of pressure sensors, as a result of isolation failure.

Sino can include custom electronics and a sensing element to withstand 500VDC isolation to work in extreme electrical conditions.  

The use of a 4-20mA output signal for transmission lengths greater than 15 feet in environments with electrical noise, will help prevent signal loss or noisy signal conditions.

Read more about: What is a pressure sensor and how it works? 

Using Pressure Transducers for Water Pipe Pressure Measurement at Water Distribution Utilities

Inlet and Outlet Water Pipe Pressure Measurement in Clean Water Systems

Clean water systems use lift stations and gravity feed reservoirs, to pump water between locations.

In some residential settings, lift stations and water towers alone cannot supply enough pressure, to provide users at higher elevations with clean water.

Also, water reservoirs and water towers, that experience sudden, large draws of water need replenishment.

Pressure-controlled variable frequency drive pumps (VFDs) are used with pressure transducers, for reliable electronic pressure measurement to determine when extra pressure and flow are required by users.

Pressure transducers are used to monitor water pressure, at elevation, in reservoirs, and the rate of change in each.

VFD pumps interpret the pressure inputs and output the necessary increase or decrease in pump output pressure and flow rate.

Of course, in the water supply or wastewater treatment industry, the measurement of water flow is also very important. 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.

Electronic Pressure Transducer Applications for Water Pipe Pressure Measurement in Clean Water Systems

Pressure transducers are used for inlet and outlet water pipe pressure measurement, in clean water systems at public utilities.

An electronic pressure transducer is typically used in water distribution applications such as:

  • Pump intake pressure measurement
  • Pump output pressure measurement
  • End location (reservoir, elevated piping, etc.) pressure measurement

An important part of pressure transmitter selection is ensuring that any electronic pressure transducer used is compatible with potable water.

Pressure transducers are responsible for monitoring the pressure, at various locations throughout clean water systems and often interface with VFD pumps to show, when increased pressure or flow rates are necessary.

The SI-200 and SI-390 electronic pressure transducers are designed for long lifetimes, in both inlet and outlet pipes of clean water systems.

They can usually be delivered within days in a wide variety of configurations.

In addition to measuring water pressure, you may also need to measure water depth. We also provide Portable Ultrasonic Water Depth Gauge.

How to select a water pressure transducer for water pressure?

  1. Absolute or gauge pressure measurement
  2. Cable or flying lead pressure transmitter wiring
  3. Media compatibility for pressure transmitters
  4. Moisture resistance in pressure transmitters
  5. Pressure transmitter accuracy and errors
  6. Radiofrequency (RFI) and electromagnetic interference (EMI) in pressure transmitters
  7. Standard or flush diaphragm pressure transmitters
  8. Vibration resistance in pressure transmitters

Read more about: What is industrial pressure transmitter?

Submersible water pressure sensor

Submersible pressure transducer with 4-20mA output is Hydrostatic Level Sensor for level measurement. Submersible pressure transducer is based on the measured liquid static pressure proportional to the height of the liquid Principle. Convert static pressure into electrical signal. After temperature compensation and linear correction. Convert into standard electrical signal. Generally 4 ～ 20mA / 1 ～ 5VDC. It can also be called “static pressure liquid level gauge, liquid level transmission Device, liquid level sensor, water level sensor “. Bullet, cage, and flush tip models are available. Applications include pumps, downhole, oil tanks, lime slurry, and water tanks. There is a miniature submersible transmitter that is low power voltage.

Extended reading: What is a pressure sensor?

Liquid pressure sensor for water pipe

SI-151 Hydrostatic Level Sensor
Hydrostatic Level Sensor (Best Price), also called Hydrostatic level transmitter. Continuous level measurement in liquid applications with pressure sensors.
SI-10 Liquid pressure sensor
Liquid pressure sensor is widely used for pressure measurement of various liquids. Like water or oils. IP68 waterproof.
SMT3151TR Submersible Level Transmitter
Hydrostatic level transmitter is also called hydrostatic level gauge. The rod-type Hydrostatic level transmitter 4-20mADC standard signal output. Flange or threaded installation. Can withstand high temperatures up to 450 ℃.
SI-PCM260 Deep Well Water Level Sensor
Well water level sensor is to apply Hydrostatic Level Sensor to deep well. Well water level sensor submerged in deep well work together with submersible water pump. Range 300m ～ 1000m.
SI-302 Anti-corrosive Submersible Level Transmitter
Submersible Level Transmitter is made of Anti-corrosive all-tetrafluoroethylene(PTFE) material. It has high temperature resistance, corrosion resistance and anti-clogging.
Extended Diaphragm Seal DP Level Transmitter Extended Diaphragm Seal DP Transmitter is a level transmitter direct mounted on pipe or tank. The isolation diaphragm is in direct contact with the liquid medium.
Remote Seal Differential Pressure Transmitter Remote seal differential pressure transmitter is used to prevent medium from entering transmitter. The pressure sensitive diaphragm and the transmitter are connected by a capillary filled with fluid. It is used to measure the level, flow and pressure of fluids, gases or steam.
Differential pressure(DP) level transmitter Differential pressure (DP) level transmitter is a perfect solution for tank level measurement. Flanges, seal diaphragms, capillaries, and DP transmitter are often used to measure liquid levels.

What are the different types of pressure sensors?

There 4 main types of pressure sensors based on this: 

More about Industrial Pressure Sensors

FAQ

How does a pressure transducer work?

The installation of the pressure transducer measurement system,
consists of three parts, namely the laying of the pressure guiding tube,
the laying of the electrical signal cable and the installation of the differential pressure transmitter.
During the operation of the pressure transmitter, the pressure of the medium is transmitted to the central measuring diaphragm.
Through the isolating diaphragm and the silicone oil, and the pressure difference from the double-sided pressure guiding tube is received on the double-sided isolating diaphragm, where the membrane is measured.
The sheet functions as a resilient element and is deformed by the pressure difference.
There is a positive proportional relationship, between the displacement of the measuring diaphragm and the differential pressure.
And under the influence of the displacement of the diaphragm, the capacitance of the differential capacitor also changes.
And the measuring circuit converts it into a DC current signal of 4-20 mA.
Extended reading: Hydrostatic Pressure Transmitter

Where are pressure transducers used?

Pressure transducers are mainly used in the following areas:
Petroleum, petrochemical, chemical. Matching with throttling devices to provide accurate flow measurement and control. Measures pressure and level in pipes and tanks.
Electricity, city gas. And other companies and businesses require high stability and high precision measurement and other places.
Pulp and papermaking are used in places that require chemical-resistant liquids and corrosion-resistant liquids.
Steel, non-ferrous metals, and ceramics are used in furnace pressure measurement and other places that require high stability and high precision measurement. They are also used in places that require stable measurement under strict control (temperature, humidity, etc.).
Machinery and shipbuilding, used to strictly control the place where high precision is required for stable measurement.
Extended Reading: 4 wire pressure sensor wiring diagram

What is pressure sensor and how it works?

A pressure sensor is a device or device that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.
A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. A pressure sensor is the core part of pressure transmitter. More.
Extended Reading: Wireless Water Meter

Read more about: How to Calculate Pressure Drop in a Pipe?

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