Product introduction

Diaphragm pressure gauge refers to a pressure gauge that uses a diaphragm device (filled with working liquid inside) to isolate the indicating part from the measured medium. It is suitable for measuring the medium pressure with strong corrosion, high temperature, high viscosity, easy crystallization, easy solidification and solid floating substances, and the occasions where the measuring medium must be prevented from directly entering the general pressure instrument and sediment accumulation and easy cleaning.

Technical index

Because the diaphragm pressure gauge system is filled with sealing liquid as the medium for pressure transmission, the indication of the pressure gauge increases with the increase of the temperature of the pressurized part due to the temperature volume expansion coefficient of the sealing liquid. The temperature influence is related to the expansion coefficient of the sealing liquid, the rigidity of the diaphragm and the temperature of the pressurized part, especially for the pressure gauge with low range. Generally, the temperature error of the pressure part shall not be greater than 0.1%/C. Therefore, the total temperature influence of the diaphragm pressure instrument is generally the sum of the temperature influence quantity of the general instrument and the pressure part of the diaphragm device.