Classification of pressure gauges（二）
5, according to the use of different functions can be divided into local indication type pressure gauge and with electric signal control type pressure gauge.
① general pressure gauge, vacuum pressure gauge, seismic pressure gauge, stainless steel pressure gauge, etc. belong to the local indication type pressure gauge, in addition to indicating the pressure without other control functions.
② with electric signal control type pressure gauge output signal mainly has.
a, switch signal (such as electric contact pressure gauge)
b, resistance signal (such as resistance remote pressure gauge)
c, current signal (such as inductive pressure transmitter, remote pressure gauge, pressure transmitter, etc.)
6, according to the different characteristics of the measurement medium can be divided into: general pressure gauge, corrosion-resistant pressure gauge, explosion-proof pressure gauge and special pressure gauge.
① General pressure gauge for measuring the pressure of liquid, gas or steam without explosion, crystallization, solidification or corrosion of copper and copper alloy;
②Corrosion-resistant pressure gauge for measuring the pressure of corrosive media, commonly used stainless steel pressure gauge, diaphragm type pressure gauge, etc.;
③Explosion-proof pressure gauge used in the environment with explosive mixtures of dangerous places, such as explosion-proof electric contact pressure gauge, explosion-proof transmitter, etc.
7, according to the use can be divided into ordinary pressure gauge, ammonia pressure gauge, oxygen pressure gauge, electric contact pressure gauge, remote pressure gauge, vibration-resistant pressure gauge, with test pointer pressure gauge, double needle double tube or double needle single tube pressure gauge, digital display pressure gauge, digital precision pressure gauge, etc.
