Thermal Mass Gas Flow Meter

About Thermal Mass Gas Flow Meter

Theory:

The meter contains two platinum resistance temperature sensors. The thermal principle operates by

monitoring the cooling effect of a gas stream as it passes over a heated sensor. Gas flowing through

the sensing section passes over two sensors one of which is used conventionally as a temperature sensor,

whilst the other is used as a heater. The temperature sensor monitors the actual process values whilst the

heater is maintained at a constant differential temperature above this by varying the power consumed by

the sensor. The greater the gas velocity, the greater the cooling effect and power required to maintain the

differential temperature. The measured heater power is therefore a measure of the gas mass flow rate

Feature :

- Measuring the mass flow or volume flow of gas

- Do not need to do temperature and pressure compensation in principle with accurate measurement

and easy operation.

- Wide range: 0.5Nm/sïž100Nm/s for gas. The meter also can be used for gas leak detection

- Good vibration resistance and long service life. No moving parts and pressure sensor in transducer,

no vibration influence on the measurement accuracy

- E asy installation and maintenance.

- D igital design, high accuracy and stability.

- Configuring with RS485 interface to realize factory automation and integration