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Thermal gas mass flow meter is an instrument that uses the principle of thermal diffusion to measure gas flow. The sensor consists of two reference grade resistor thermometers (RTDs). One is the speed sensor RH, and the other is the temperature sensor RMG that measures the temperature change of the gas. When these two RTDs are placed in the gas to be measured, one of the sensors RH is heated, and the other sensor RMG is used to sense the temperature of the gas to be measured. As the gas flow rate increases, the air flow takes away more heat, and the temperature of the sensor RH decreases.

Features

Thermal gas mass flow meter is an instrument that uses the principle of thermal diffusion to measure gas flow. The sensor consists of two reference grade resistor thermometers (RTDs). One is the speed sensor RH, and the other is the temperature sensor RMG that measures the temperature change of the gas. When these two RTDs are placed in the gas to be measured, one of the sensors RH is heated, and the other sensor RMG is used to sense the temperature of the gas to be measured. As the gas flow rate increases, the air flow takes away more heat, and the temperature of the sensor RH decreases.

Thermal flowmeter is a flow meter designed based on the principle of thermal diffusion. That is, when the fluid flows through a heating object, the amount of heat dissipated by the heating object is proportional to the flow rate of the fluid. The sensors of this series of flowmeters have two standard One grade RTD is used as a heat source and the other is used to measure the fluid temperature. When the fluid flows, the temperature difference between the two has a linear relationship with the flow rate. This relationship is then controlled by microelectronic control technology. Converted into a linear output measuring flow signal.

Thermal gas mass flowmeter uses the principles of thermal diffusion and heat distribution to calculate the flow rate by using the amount of heat taken away by the gas. The measurement results are less affected by temperature and pressure changes, and the range ratio can reach 30:1. The installation method is plug-in type, with basically no pressure loss. It is suitable for measuring the flow rate of dry gas with relatively stable medium components.

1. Working principle:

Large flow rate: The principle of thermal diffusion uses the amount of heat taken away by the gas to determine the flow rate;

Small flow: heat distribution principle;

2. System composition: simple with no moving parts, integrated at normal temperature, split at high temperature;

3. Applicable measurement medium: dry gas, medium composition is stable;

4. System error: ± 1% mass flow accuracy;

5. System intelligence: multiple parameter modifications and intelligence;

6. Calibration: The factory calibration data is stored in the instrument, and the instrument performance can be verified on-site, and the results can be traced;

7. Range ratio: Large range ratio, 30:1 while ensuring accuracy;

8. Flow results: mass flow, temperature and pressure changes have little impact;

9. Temperature and pressure compensation: not required;