Do you know why the measurement data of the gas mass flowmeter is unstable?

Do you know why the measurement data of the gas mass flowmeter is unstable? The gas mass flowmeter is mainly for the measurement of gas, but it will be affected by some factors during the application process, the measurement data is unstable, that is, the accuracy is not high, we will introduce it below Down. First, the thermal properties of the gas will change with changes in pressure and temperature. As the temperature of the gas changes, its density and gas composition will also change. For example, air is more affected by temperature, while CO2 is more affected by pressure. . Due to its temperature and pressure and density changes. The thermal gas mass flowmeter measures the gas mass flowmeter. According to the mass conversion formula m=dV; the mass of gas in m, the density of gas in d, and the volume of gas in V, we can see that the density changes and the quality changes again. . Second, the gas contains impurities, or water vapor. When there are too many impurities in the gas, the impurities will cause the probe of the gas mass flow meter to stick to the probe, reducing the sensitivity of the sensor. If there is water vapor, it will form condensation, there is condensation on the sensor, and if the surface of the sensor is covered by condensed water, the real temperature and humidity sensing of the external environment will be cut off. Because the temperature change data cannot be detected by the sensor itself, the measurement data is unstable. The solution to the above problems is to compensate the gas mass flowmeter for temperature and pressure, to solve the instability of data measurement caused by temperature and pressure changes, to form condensation in the gas, to isolate the sensor with a diaphragm, and to coat the sensor to solve the problem question.

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