Is a thermal gas flow meter a gas volume flow meter?

Thermal gas flow meter is a type of gas volume flow meter. Gas volume flowmeters are a type of instrument used to measure the flow of gases. They measure the volume flow of gases through different principles, usually expressed in standard volume units (such as cubic meters per hour).

Thermal gas flow meter is a common gas volume flow meter that works based on the principle of heat conduction. The following is the working principle and main features of thermal gas flow meters:

Working principle:

Thermal gas flow meters use a filament or film as a sensor, which is heated to a constant temperature.

When gas flows through the sensor, the temperature of the sensor will be affected by the cooling of the gas, and the degree of cooling is proportional to the flow rate of the gas.

The higher the flow rate of the gas flowing through, the greater the temperature drop of the sensor, and the lower the flow rate, the less the temperature drop.

By measuring the change in sensor temperature, the volumetric flow rate of the gas can be determined.

Main features:

1. Thermal gas flow meters do not have high requirements on the physical properties of gases (such as density, pressure, temperature) and are suitable for a variety of gases.

2. Can measure gas flow ranging from low flow rate to high flow rate.

3. The response speed is fast and real-time traffic measurement can usually be achieved.

4. Since there are no moving parts, it has a long life and low maintenance costs.

5. Digital or analog output can be provided to facilitate data recording and control system integration.

In general, the thermal gas flow meter is an accurate, reliable and sensitive gas flow measurement device, which is widely used in industrial process control, laboratory research, environmental monitoring and other fields.