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1. Can the installation head of a thermal gas mass flowmeter rotate? 2. Unit of thermal gas flowmeter:
3. Types of mass flowmeters:
4. Formula of thermal gas flowmeter:
The core formula of thermal gas flowmeter is related to mass flow rate, commonly in the form of Q=K × Δ T/(I × R). Before understanding this formula, lets first talk about its application background. Thermal gas flow meters are often used in industrial, laboratory, and other scenarios, such as monitoring pipeline gas flow rates or factory exhaust emissions. Its principle is to sense the heat carried away by gas flow through heating elements, and thus calculate the flow rate. 1. Formula disassembly: Q in the formula represents mass flow rate, usually measured in kg/s; K is the instrument coefficient, determined by the characteristics of the equipment itself; Δ T is the temperature difference, which refers to the temperature difference between the heating element and the gas; I and R are the heating current and sensor resist
2. Precautions for equipment use: These instruments need to maintain a stable measurement environment. Sudden changes in gas composition (such as mixing with water vapor or impurities) can cause a shift in the coefficient K, affecting the results. When selecting a flowmeter, it is necessary to confirm the composition, temperature, and pressure range of the gas in advance. Thermal flow meters are also used in medical ventilators, boiler room gas control equipment, and other devices. In practical operation, engineers usually pre store multiple sets of coefficients K based on gas types (such as oxygen, nitrogen, or mixed gas), and switch modes through buttons when in use, which is as convenient as switching network settings on a mobile phone. The new model products launched in 2023 now support Bluetooth calibration, and users can fine tune parameters using a mobile app.
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