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A thermal gas mass flow meter is designed based on the principle of thermal diffusion, and it uses a constant temperature difference method to accurately measure gases. It has advantages such as small size, high degree of digitization, easy installation, and accurate measurement. The sensor section consists of two reference-grade platinum resistance temperature sensors; during operation of the instrument, one of these sensors continuously measures the temperature T1 of the medium ； Another sensor heats itself to a temperature higher than the medium temperature T2; it is used to detect the fluid flow rate and is known as a velocity sensor. This temperature difference ΔT is given by ΔT = T2 – T1, with T2 > T1. When fluid flows through, gas molecules collide with the sensor and carry away the heat from T2, causing its temperature to drop. To keep ΔT constant, it is necessary to increase the power supply current to T2. The faster the gas flow, the more heat is carried away; there is a fixed functional relationship between the gas flow rate and the amount of heat removed. This is the principle of maintaining a constant temperature difference. Since the sensor temperature is always automatically maintained about 30°C higher than the medium (ambient) temperature, thermal gas flow meters inherently do not require temperature compensation. Thermocouple differential thermal gas mass flow meters are unaffected not only by temperature but also by pressure. Thermal gas mass flow meters are true direct-type mass flow meters, eliminating the need for users to make corrections for pressure and temperature. Thermal mass flow meters have the following technical advantages: they are true mass flow meters that require no temperature or pressure compensation for measuring gas flow, offering convenient and accurate measurements. The mass flow rate or standard volume flow rate of the gas can be obtained. It features a wide range ratio, enabling the measurement of gas flow rates as high as 100 Nm/s and as low as 0.1 Nm/s, and can be used for gas leak detection. It has good seismic performance and a long service life. The sensor has no moving parts or pressure-sensing components, so vibrations do not affect its measurement accuracy. Easy to install and maintain. Where site conditions permit, installation and maintenance can be carried out without shutting down production. (Special customization required) Digital design. Overall digital circuit measurement, providing accurate results and facilitating maintenance. Using RS-485 or HART communication can achieve factory automation and integration. For more information, please visit the company’s official website at http://www.yb1518.com/. Please retain this link when reproducing the content! http://www.yb1518.com/UploadFiles/201511391437413.jpg