Thermal gas mass flowmeter is a new instrument for measuring and controlling gas mass flow. It can be used to monitor air, oxygen, nitrogen, gas, nitrogen, hydrocarbon gas, natural gas, coal gas and flue gas in petroleum, chemical industry, iron metallurgy, electric power, light industry and medicine, environmental protection and other industrial departments. This product can replace orifice plate, venturi tube, A Niu bar, vortex street and other flowmeters. Its characteristics are high reliability, good repeatability, small pressure loss, no moving parts, wide range ratio, fast response, high measurement accuracy and no need for temperature and pressure compensation. Especially, it has obvious advantages in large diameter, low flow rate, large variation of flow range and ultra-small flow measurement. In view of the above characteristics, it can also be conveniently used as a flow switch. For hydrogen flow measurement with small density and Reynolds number, it is superior to orifice plate, turbine and vortex flowmeter. This is a very suitable flowmeter for measuring hydrogen. In addition, our company has developed a flow sensor which can be used to measure blast furnace gas. It uses a thermal gas mass flowmeter based on the principle of constant temperature difference to measure the gas flow, which has a great zero drift caused by water, oil and impurities in the gas, resulting in the disadvantage of being unable to measure. It can also be used to measure the mass flow of wet gas, such as real-time detection of air volume (speed) in underground air supply and exhaust system. The structure of the flowmeter is flexible and diverse, and it can be divided into plug-in and pipeline type, which is very suitable for different users. Especially, the plug-in mass flowmeter makes the flow (velocity) measurement with large diameter and low pressure simple and easy.
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