Thermal mass flow meter is an advanced instrument used to measure fluid mass flow rate. It adopts the principle of heat transfer and determines the flow rate by measuring the heat absorption of the fluid flowing through the sensor, thus achieving accurate mass flow measurement. Thermal mass flow meters are widely used in industrial production, energy management, environmental protection, and other fields. The Hongguang instrument will delve into the principles, characteristics, advantages, and applications of thermal mass flow meters in different fields.
1、 Working principle of thermal mass flow meter
The thermal mass flowmeter is based on the principle of heat conduction, and calculates the mass flow rate of the fluid by heating a hot wire in the sensor and measuring the rate at which the hot wire is cooled by the fluid. When a fluid passes through a hot wire, it carries away heat, causing the temperature of the hot wire to decrease. The sensor will monitor the temperature changes of the hot wire in real-time and calculate the mass flow rate of the fluid by comparing the initial temperature of the hot wire with the real-time temperature difference.
2、 Characteristics of thermal mass flow meters
（1）High precision: The thermal mass flowmeter adopts advanced heat conduction technology, which can achieve high-precision mass flow measurement, usually with an accuracy of ± 1% or higher.
（2）Wide measurement range: Thermal mass flow meters are suitable for different types of fluids, including liquids and gases, and can operate over a wide range of flow rates.
（3）Real time monitoring: Thermal mass flow meters can monitor the changes in fluid mass flow rate in real time, providing accurate flow data for easy real-time control and management.
（4）No moving parts: The thermal mass flow meter has no moving parts, so it has a long service life and stable performance.
（5）Strong anti-interference ability: The thermal mass flowmeter has strong anti-interference ability against external factors and can work stably in harsh environments.
3、 Advantages of thermal mass flow meters
（1）Accurate measurement: Thermal mass flow meters can accurately measure the mass flow rate of fluids, ensuring accurate measurement and quality control during the production process.
（2）Energy conservation and environmental protection: Thermal mass flow meters do not require an increase in fluid pressure for measurement, thereby reducing energy consumption and having a positive effect on energy conservation and environmental protection.
（3）Automation control: Thermal mass flow meters can achieve automation control, automatically regulate fluid flow, and improve the automation level of the production process.
（4）High reliability: The thermal mass flowmeter adopts advanced sensing technology and stable electronic components, which has high reliability and long service life.
（5）Easy maintenance: As the thermal mass flow meter has no moving parts, it is easy to maintain and reduces maintenance costs and workload.
4、 The Widespread Application of Thermal Mass Flowmeters
（1）Industrial production: Thermal mass flow meters are used in industrial processes to measure the mass flow rate of liquids and gases, controlling the production process and optimizing production efficiency.
（2）Energy management: In the energy industry, thermal mass flow meters are used to measure the mass flow of energy sources such as gas, steam, and petroleum, for energy consumption monitoring and energy-saving management.
（3）Environmental protection: Thermal mass flow meters are used in environmental monitoring and discharge pipelines to monitor the mass flow rate of pollutants such as wastewater and exhaust gas in real-time, ensuring the effective implementation of environmental protection.
（4）Food and Pharmaceutical: In the food and pharmaceutical industry, thermal mass flow meters are used to accurately measure the flow of liquids and gases, ensuring product quality and production hygiene and safety.
As a high-precision and highly reliable flow measurement device, thermal mass flow meters play an important role in industrial production, energy management, environmental protection, and other fields. Its advantages such as accurate measurement, energy conservation and environmental protection, and automation control make thermal mass flow meters an intelligent solution for precision flow measurement