Thermal gas mass flow meter adopts the principle of thermal diffusion, thermal diffusion technology is a technology with excellent performance and high reliability under harsh conditions, and its typical sensing elements include two thermal resistors (platinum RTD), one is a speed sensor, and one is a temperature sensor that automatically compensates for gas temperature changes. When the two RTDS are placed in a medium, where the velocity sensor is heated to a constant temperature difference above the ambient temperature, the other temperature sensor is used to sense the medium temperature. The mass flow of gas through the velocity sensor is calculated by the heat transfer of the sensing element. As the gas rate increases, the heat transferred by the sensor to the medium increases, so more power is required, and the power of the electronic unit heating RTD corresponds to the mass flow rate to a certain extent.

Thermal gas mass flow meter is a new type of instrument in gas flow measurement, different from other gas flow meters do not need to carry out pressure and temperature correction, directly measure the mass flow of gas, a sensor can do the range from very low to high range. It is suitable for the measurement of single gas and fixed proportion multi-component gas. It is based on the principle that the rate at which the fluid absorbs heat is directly related to the mass flow rate. The larger the flow rate, the more molecules in contact with the thermal resistance, the more heat is absorbed, and the heat absorption is related to the number of molecules of a gas, thermal characteristics and flow characteristics.
Thermal gas mass flowmeter product features, direct measurement of gas mass flow, without temperature, pressure compensation low flow rate measurement; A flowmeter can take into account both small flow and large flow measurement, especially suitable for large diameter measurement.
Used in industrial pipeline gas flow measurement; Air flow measurement in gas process; Measurement of flue gas flow from the chimney; Measurement of organ air flow in water treatment; Gas flow measurement in cement, cigarette, glass factory production process compressed air flow measurement; Natural gas, gas, liquefied gas, flare gas, hydrogen and other gas flow measurement; Air flow measurement in steel works
Xi ‘an Yunyi Instrument Co., Ltd. is a high-tech enterprise engaged in instrument research, development, production, sales and service. The company has first-class instruments and equipment, perfect scientific management system and system, has rich experience in design and manufacturing, the company strictly implements the international standards of products and domestic industry standards, according to the use of environmental conditions and process requirements of domestic industrial and mining enterprises to develop strict process flow. Products are widely used in heating, gas supply, chemical industry, environmental protection, metallurgy, textile, steel, medicine, paper, drainage and other factories and mining enterprises. At the same time, the company in cooperation with many strength instrument manufacturers in the development, has become the domestic instrument industry exports the most production-oriented manufacturers.