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Why can't I use thermal gas mass flow meter to measure acetylene gas?

2021-08-20
 Why can't I use thermal gas mass flow meter to measure acetylene gas?

The sensor part of the thermal mass flow meter is composed of two reference-level platinum resistance temperature sensors, using a bridge loop, one sensor measures the temperature of the fluid, and the other sensor is a heating element to maintain a constant temperature difference higher than the fluid temperature, that is, the gas flows through the heating element When the heat is taken away, the heat taken away is proportional to the flow rate of the gas and the density of the gas.

The relative molecular weight of acetylene gas is 26 and the average molecular weight of air is 29, so it is difficult to distinguish (density).

Acetylene gas is extremely explosive gas, and general flowmeter products must exclude acetylene gas for explosion-proof certification.


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