Do you know why pressure oil filled?

Pressure gauge is the main purpose of the oil filled in order to reduce pointer in relatively large variations in pressure buffer to zero, so that we can effectively ensure the sensitivity of pressure gauge. Applicable to the environmental vibration place, can tolerate the pulsation of the medium, impact and sudden unloading, guarantee the stability of instrument is clear. Oil filled pressure gauge of oil mainly including glycerin and silicone oil. 1, glycerin: mainly seismic action; 2, silicone oil, and the earthquake effect, but the silicone oil than glycerol good low temperature resistance, if outdoor - Crystallization of the 20 ℃, glycerin, but silicone oil can make the instrument work normally. Using oil filled pressure gauge note: 1. Used by environmental temperature, indicating value of the instrument is not back to zero, usable fine needle in through a small hole instrument rubber plug, make the instrument lumen and atmosphere are interlinked. 2. Working environment should be no corrosive gas.