Thermal gas mass flowmeter

The thermal gas mass flowmeter is designed based on the principle of thermal diffusion, and uses the constant temperature difference method to accurately measure gases. It has the advantages of small size, high degree of digitization, easy installation, and accurate measurement.

　　Thermal gas mass flowmeterAlso known as Roots gas flowmeter, it is designed based on the principle of thermal diffusion and uses the constant temperature difference method to accurately measure gases. It has the advantages of small size, high degree of digitization, easy installation, and accurate measurement. Quality flowmeter is a relatively accurate, fast, reliable, efficient, stable, and flexible flow measurement instrument, which will be widely used in fields such as petroleum processing and chemical industry. It is believed that it will show great potential in promoting flow measurement. A mass flow meter cannot control the flow rate. It can only detect the mass flow rate of gas and output the flow value through analog voltage, current, or serial communication.

Working Principle:

　　Thermal gas mass flowmeterIt is an instrument that uses the principle of constant temperature difference to measure gas flow rate. The sensor part consists of two reference level platinum resistance temperature sensors. When the instrument is working, one sensor continuously measures the medium temperature T1; the other sensor self heats up to a temperature higher than the medium temperature T2 and is used to sense fluid flow velocity, known as a velocity sensor. The temperature Δ T=T2-T1, T2>T1. When a fluid flows through, the gas molecules collide with the sensor and take away the heat of T2, causing the temperature of T2 to decrease. To keep Δ T constant, the power supply current of T2 needs to be increased. The gas flow rate is faster, and the more heat is taken away. There is a fixed functional relationship between the gas flow rate and the increased heat. Due to the fact that the temperature of the sensor is always automatically and consistently higher than the temperature of the medium (environment) by about 30 ℃, thermal gas flow meters do not require temperature compensation in principle.