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Temperature Characteristics Of Diaphragm Pressure Gauge
- Dec 19, 2018 -

Since the diaphragm pressure gauge system is filled with the sealing liquid as the medium for transmitting the pressure, the pressure gauge increases the temperature of the pressure receiving portion due to the temperature expansion coefficient of the sealing liquid, and the temperature influence amount and the expansion of the sealing body. The coefficient, diaphragm stiffness and pressure temperature are related, especially for low-range pressure instruments. Generally, the temperature error of the pressure receiving portion is not more than 0.1%/degree, so the total temperature influence of the diaphragm pressure gauge is generally the sum of the temperature influence amount of the universal meter and the temperature influence of the pressure portion of the diaphragm device.