Summary of characteristics of thermal gas mass flowmeter

The unique temperature difference measurement method of the hot gas mass flowmeter overcomes the great zero drift caused by water, oil and impurities in the gas when measuring the gas flow by the hot gas mass flowmeter based on the principle of constant temperature difference.

With the development of new energy technology, natural gas is more and more widely used in many new energy industries, and the thermal gas mass flowmeter has become a suitable instrument for measuring high pressure gas measurement. Below we analyze from the perspective of product performance and installation cost, why the thermal gas mass flowmeter can become a suitable low degree meter in high pressure natural gas measurement.

Thermal gas mass flow meter is used to measure and control the gas mass flow meter, different from other gas flow meters, do not need to carry out pressure and temperature correction, directly measure the gas mass flow.

Thermal gas mass flowmeter is the use of fluid flowing through the pipe heated by an external heat source when the temperature field changes, is a high-sensitivity, high-precision gas measurement instrument, in the gas flow measurement conditions, good stability, used for gas process control and gas flow measurement one of the most used instruments.

What are the technical advantages of thermal gas mass flowmeters?

The thermal gas mass flowmeter is used for the measurement of a single component of gas or a fixed proportion of mixed gas, and has been widely used in petroleum, chemical, semiconductor, medical instruments, biological engineering, combustion control, gas distribution, environmental monitoring, precision instruments, scientific research, metrology, food, metallurgy, aerospace and other fields.

Thermal gas mass flowmeter as a gas flowmeter, the application is very wide, today we specifically understand the use of thermal gas mass flowmeter:

I believe that friends who understand the thermal gas mass flowmeter know that it can measure a lot of gas flow, why this flowmeter can achieve such a wide range of applications?

The thermal gas mass flowmeter is an instrument that uses the principle of heat conduction to measure fluid flow. The instrument uses the constant temperature difference method to measure the gas flow accurately. It has the advantages of small size, high digitization, easy installation and accurate measurement.

In the industrial field, companies need to use natural gas, hydrogen and other gas in many process production, sometimes also need oxygen, nitrogen, argon and other made of gas, this part of the gas cost needs to be controlled and monitored, and the selection of monitoring instruments need to consider various issues:

Thermal gas mass flowmeters are a type of mass flowmeter specifically designed for measuring the flow rate of gases, while mass flowmeters, in a broader sense, can measure the flow rate of both gases and liquids. Here are some key differences between thermal gas mass flowmeters and other types of mass flowmeters:

The thermal gas mass flowmeter is an instrument for measuring fluid flow by using the principle of heat conduction. The instrument uses constant temperature difference method to accurately measure the gas mass flow. The thermal gas mass flowmeter has the advantages of small size, high digitization, easy installation and accurate measurement.

The thermal gas mass flowmeter is an instrument that uses the principle of heat conduction to measure flow. The instrument uses the constant temperature difference method to accurately measure the gas mass flow rate. It has the advantages of small size, high digitization, easy installation, accurate measurement and so on.

The thermal gas mass flowmeter uses the principle of thermal diffusion, and its working principle determines the change of the measured medium gas with the temperature and pressure, which affects the data change of the measured results.

Thermal gas mass flowmeter is based on the principle of thermal diffusion design and production of the product is widely used in steel plants, coking plants, petroleum, chemical, thermal, medical, thermal power plants, environmental protection and other industries.

In practical applications, thermal mass flowmeters require careful attention to various factors to ensure accurate and reliable measurement of fluid flow rates. Here are some key considerations for the practical application of thermal mass flowmeters:

Direct measurement of gas mass, without temperature, pressure compensation of gas flow measurement instrument, it represents the development trend of gas flow measurement. The thermal mass flowmeter sensor part is composed of two reference platinum resistance temperature sensors, using a bridge loop, one sensor measures the fluid temperature, and the other sensor is a heating element, maintaining a constant temperature difference higher than the fluid temperature, that is, when the gas flows through the heating element, the heat is taken away, and the heat is proportional to the flow rate of the gas and the density of the gas. To maintain a fixed temperature difference between the two temperature sensors requires the circuit to provide more power to the heating element, and the amount of output power in the circuit is related to the mass of the fluid, thus measuring the flow rate.

Measuring medium: Various gases (except acetylene gas)
Pipe diameter range: DN10-2000mm
Accuracy Degree: ±1～2.5%
Pipe material: Carbon steel, stainless steel, plastic, etc

Like the flue gas, this medium has a higher temperature, contains more impurities such as solid dust, the general application of large caliber, flow rate range is relatively wide, so the measurement is more difficult, so in the selection and use of flue gas flow timing should pay attention to the characteristics of the power plant flue wind speed, pay attention to the principle of choosing sensors, It is also necessary to pay attention to the wear resistance, corrosion resistance, dirt resistance and high temperature resistance of the sensor, and select the appropriate measurement position to ensure the measurement accuracy.

At the heart of a thermal mass flow meter is a sensor that heats up a portion of the gas stream while monitoring the temperature difference between the heated and unheated sections. As the gas flows over the heated sensor, it carries away heat, and the temperature difference provides a direct measurement of the mass flow rate. The beauty of this method lies in its ability to provide accurate readings across a wide range of flow rates, from low to high velocities, ensuring versatility and reliability in various industrial settings.

Structural form: plug-in pipelined
Measuring medium: All gases (except acetylene)
Pipe diameter range: Caliber DN32 or higher DN10～DN2000mm
Velocity range: 0.1～120Nm/s
Precision: ±1～2.5%
Operating temperature: Sensor：-40℃～+220℃
convertor：-20℃～+45℃
Working pressure: Medium pressure≤2.5Mpa
Medium pressure≤4.0Mpa
Power supply: DC24V or AC220V≤18W

1. The gas flow measurement does not need temperature and pressure compensation, and the measurement is convenient and accurate. The mass flow rate or standard volume flow rate of the gas can be obtained.

When applying a thermal mass flowmeter, several key points need to be considered to ensure accurate and reliable measurement. Here are some important factors to pay attention to:

The thermal gas mass flowmeter is an instrument for measuring fluid flow by using the principle of heat conduction. The instrument uses constant temperature difference method to accurately measure the gas mass flow.

Thermal gas mass flowmeter can be used to measure any gas that does not contain condensed liquid in various shapes and materials (such as round pipe, square pipe, rectangular pipe, etc., diameter from 8mm-10000mm or larger, all kinds of metal, plastic, cement material), it does not need temperature and pressure compensation, directly measure the mass flow of fluid.

When selecting a thermal mass flowmeter, several important factors should be taken into consideration to ensure it meets the requirements of the application and provides accurate and reliable measurements. Here are key points to pay attention to:

Thermal gas mass flowmeter adopts the principle of thermal diffusion, and thermal diffusion technology is a technology with excellent performance and high reliability under harsh conditions.

The thermal gas mass flowmeter is an instrument that uses the principle of heat conduction to measure flow. The instrument adopts constant temperature difference method for gas mass flow sensor part consists of two reference platinum resistance temperature sensors. Using a bridge loop, one sensor measures the flow temperature and the other maintains a constant temperature difference above the fluid temperature, allowing flow measurement under high temperature and high pressure conditions.

At present, oxygen generator in the production process will be affected by external influences, more and more enterprises for fine management, energy consumption, cost accounting and other requirements for the loss of this part of the oxygen measurement.

The thermal gas mass flowmeter is an instrument that uses the principle of heat conduction to measure flow. The instrument uses the constant temperature difference method to accurately measure the gas mass flow rate. It has the advantages of small size, high digitization, easy installation, accurate measurement and so on.

The thermal gas flowmeter adopts the principle of thermal diffusion, and the thermal diffusion technology is a technology with excellent performance and high reliability under harsh conditions.

Thermal gas mass flowmeter is based on the principle of thermal diffusion design and production of the product is widely used in steel plants, coking plants, petroleum, chemical, thermal, medical, thermal power plants, environmental protection and other industries.