Gas Mass Flow Meter

Thermal mass flowmeters

Gas mass flow meters are very important in some important industrial fields. This kind of equipment installed in pipelines can detect gas. The gas mass flowmeter manufacturer introduced the task of monitoring the flow rate in the pipeline system.

Featured Gas mass flow meters

Gas mass flow meter types

It uses mechanical equipment measuring components to continuously divide the fluid into separate known parts of the volume. The total flow of the fluid volume is measured according to the frequency of repeatedly filling and draining part of the volume of the fluid in the measuring chamber.

Read more about Mass Flow Rate vs Volumetric Flow Rate

It is a kind of variable total area flowmeter. In a vertical tapered tube that expands from bottom to top. The force of the floating ball with the annular cross-section is borne by the hydrodynamic force. In turn, the floating ball can be freely moved in the tapered tube. Raise and lower.

Extended reading: Gas Rotameter Tips

It is an instrument that measures the total flow based on the gas pressure caused by the flow detection device installed in the pipeline, the known fluid standard and the specifications of the inspection room and the pipeline.

A non-streamlined vortex generator is placed in the fluid. The fluid is alternately separated on both sides of the generator to release two series of standard overlapping vortex meters.

Extended reading: 5 matters to pay attention to when choosing threaded Vortex Nitrogen Gas Flow Meter

It is a key type of rate flow meter. It uses a multi-leaf motor rotor (turbocharger) to experience the average water flow of the fluid. Then it calculates the total flow or total output.

A meter that measures the total flow rate based on the efficacy of the fluid fluidity on the ultrasonic beam (or ultrasonic single pulse).

The thermal flowmeter sensor includes 2 sensing technology components. A speed sensor and a temperature sensor. They compensate and calibrate the gas temperature changes fully automatically.

The electric heater part of the instrument heats the speed sensor to a certain time constant higher than the temperature of the working condition. A stable temperature difference is generated between the speed sensor and the sensor that measures the temperature of the working condition.

When the temperature difference does not change, the kinetic energy consumed by the electric heater. It can also be said that the heat dissipation value is proportional to the mass flow rate of the passing gas. It is suitable for the measurement of single gas and a fixed proportion of multiple gases.

The basic principle is to use the Coriolis force caused by the fluidity of the fluid in the vibrating tube. The force can be measured immediately or indirectly to obtain the fluid mass flow.

Extended reading: Liquid Mass Flow Meter

How To Reduce The Effect Of Pressure On The Mass Flow Meter?

Further reading: Industrial LPG/Propane flow meter

Gas mass flow meter Applications

  1. Gas quality flow measurement and operation for heating furnace and cracking furnace;
  2. Petrochemical equipment, oil production plant, torch gas quality flow measurement;
  3. Air index flow measurement and control for combustion furnace; radon mass flow and control for gas turbine generator;
  4. Food industry and beverage gas mass flow and control;
  5. Hydrogen mass flow control in waterworks;
  6. High-purity gas quality flow measurement when manufacturing semiconductor materials;
  7. Quality flow measurement of metal catalysts and organic chemical preservatives;
  8. Pump maintenance and operation, pump tightness, and grease pool leakage inspection;
  9. Central air-conditioning control system;
  10. Mass flow measurement of instrument gas, process gas, N2, etc.
  11. Gas detector, atmospheric sampler
  12. Leak detection
  13. Gas distribution system software
  14. Laboratory gas measurement
  15. Medical applications
  16. Solid-State Battery
  17. Gases used: Air, O2, N2, He, Ar, CO2, H2, CH4, C3H8, N2O, SF6, C3H6, CO, C4H10, and most of the gases.

Extended reading: Food grade flow meters for Food & Beverage industry

Read more about: Coriolis Mass Flowmeter Working Principle

Common gas flow meters include thermal mass flow meters, vortex flow meters, precession vortex flow meters, and gas ultrasonic flow meters. 

Thermal Mass Flow Meter can directly measure the mass flow of various gases. Unaffected by changes in viscosity, density, temperature, or pressure.

A thermal Mass Flow Meter is a true mass flow meter. No temperature and pressure compensation is required. Thermal gas mass flow meters are designed based on the principle of thermal diffusion. Including natural gas, coal gas, liquefied gas, flare gas, argon, carbon dioxide and other mixed gas flow measurement.Previous

Read more.

A natural gas flow meter is mainly used for inline measurement of natural gas flow. The natural gas flow meter is mainly used for industrial production and trade settlement.

At present, the flowmeter products used for natural gas flow measurement roughly include: gas waist wheel flowmeter, gas turbine flowmeter, precession vortex flowmeter, thermal mass flowmeter, vortex flowmeter, ultrasonic flowmeter and orifice flowmeter Wait. Let’s make a simple comparison on the use of these flow meters.

Read more.

LPG flow meter is used for flow measurement of liquefied petroleum gas. The flow measurement of LPG is very important in industrial production, transportation and trade settlement.

LPG gas (Liquefied petroleum gas) is a kind of hydrocarbon with propane and butane as its main components. LPG is used for heating, motor fuel, industrial applications and in agriculture. LPG can be in a gas or liquefied state. Different type industrial LPG flow meters with accurate and reliable performance. Such as thermal dispersion flow meter, Coriolis flow meter, gas turbine flow meter, vortex flow meters.

Read more LPG flow meters.

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:

Vortex flowmeter

Intelligent precession vortex flowmeter

Orifice flowmeter

Gas mass flow meter

Coriolis mass flowmeter

Rotameter flow meter

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

Read more Nitrogen Gas-Liquid Nitrogen Flowmeters.

Thermal mass flow meter

What is a Thermal Mass Flow Meter?

A thermal gas mass flow meter is a flow meter that can detect the mass flow of gas without temperature and pressure compensation.

Thermal Mass Flow Meter Unaffected by changes in viscosity, density, temperature, or pressure. Thermal mass flow meters are designed based on the principle of thermal diffusion.

Including natural gas, coal gas, liquefied gas, flare gas, argon, carbon dioxide, and other mixed gas flow measurement.

Read more about: Tips for Thermal Mass Flow Meter|Better Industrial Gas Meter

Gas mass flow meter working principle

The thermal flowmeter is a flowmeter designed based on the principle of thermal diffusion.

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

The sensors of the series flowmeter have two standards RTD,

one for the heat source, and one for measuring the temperature of the fluid.

When the fluid flows, the temperature difference between the two is linear with the flow rate,

and then the relationship is controlled by microelectronic control technology.

Converted to a linear output that measures the flow signal.

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Gas Mass Flow Controller

The gas mass flow controller is based on the principle of thermal mass flow measurement. With control valve. The Micro Gas Flow Controller (MFC) is used to precisely measure and control the mass flow of gas. Guess you like: Gas … Continue reading

Air mass flow meter VS Controller

Air mass flow meter (abbreviated as MFM) is used for precise measurement of gas mass flow.A gas mass flow controller (abbreviated as MFC) is used for precise measurement and control of gas mass flow. Related products What is a mass … Continue reading

Gas Thermal Mass Flow Meter

You may like: More Featured Industrial Gas Flow Meters FAQ 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. … Continue reading

Advantages of gas mass flowmeters

(1) The gas mass flow meter can be used at normal temperature and pressure or under high pressure. And this product can directly measure the desired data. No pressure compensation is required. No flow compensation is required. This is Unmatched by other products.

(2) It can work normally at room temperature or 100 degrees or even higher temperature. It does not need any temperature compensation. It can be effectively and directly measured.

(3) The gas mass flow meter has a relatively wide range. Generally speaking, it can take into account both small flow and large flow measurement. It is especially suitable for those large-caliber measurements.

(4) The flow resistance of the gas mass flowmeter is basically declining. The ability to resist media corrosion is relatively strong, and the measurement accuracy is relatively high.

(5) When the gas mass meteor meter is actually outputting the signal, it will take into account the situation of each signal, and it can be displayed by remote transmission, which is convenient for cooperating with other meters. It can also be effectively realized after this. Multi-flow records can be automatically accumulated, and data can be easily searched anytime and anywhere.

(6) The gas mass flowmeter is more convenient to install and easy to maintain. It can play a variety of anti-vibration functions.

(7) There are many applications of gas mass flow meters, which can be used in public works. They can be used well in the supervision system of water treatment. They can also be used in oil or natural gas projects, which can be used for energy exchange.


A gas flow meter is an instrument for measuring the flow of gas. Installed in the pipeline to record the amount of gas flowing through.

Can measure gas, air, nitrogen, acetylene, phosgene, hydrogen, natural gas, nitrogen, liquefied petroleum gas, hydrogen peroxide, flue gas, methane, butane, chlorine, fuel gas, biogas, carbon dioxide, oxygen, compressed air, argon Gas, toluene, benzene, xylene, hydrogen sulfide, sulfur dioxide, ammonia, etc.

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

A propane flow meter refers to a flow meter that can measure the volume or mass flow of propane gas. Also often called LPG gas flow meter.

Generally, flanges are used to install propane gas flow meters online. You can refer to more details: New Industrial LPG/Propane flow meter-Precession Vortex

Unit of gas flow: cfm. Square refers to 1 cubic meter of gas. Strictly speaking, square should be a unit of volume, not a unit of flow.

CMM is a commonly used medium-scale flow unit, per minute.

During the unit British period, the filter passes through a certain volume of air flow. We generally use m3/h air volume unit. Foreign countries also use m3/h air volume unit cfm (cubic feet per minute). That is, ft3/min cubic feet/minute.

Commercial conversion is: 1cfm≈1.7m3/h.

Most of our gas flow meters have a local digital display. Can display the instantaneous flow of gas, cumulative flow, etc.

Of course, there is also a pointer display. Then you need to read the flow value according to the dial scale.

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

Sino-Inst offers over 10 Gas mass flow meters, with the Best Price.

All of our flow meters can work with the AMS NEW TREX.

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

Sino-Instrument is mass flow meter supplier, 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 ultrasonic level transmitters respectively.

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

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Nitrogen Gas-Liquid Nitrogen Flowmeters

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.

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.

Guess you like Industrial oxygen flow meter

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.

Guess you like: Gas Mass Flow Meter

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.


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.

Read More about: Choose the most suitable Inline flow meter

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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.