... pressure range. 4.Glass or plastic 1.5"all stainless steel glass surface pressure gauge Specifications can be made per customer ... for measuring the pressure of liquid, gas, and steam or vacuum, which are non-crystalloid and non-concretionary, and have ... and do not erode steel and copper alloy. 2.Heating ,air-conditioning technology, pneumatics,air compressor, vacuum pump, pressure air regulating ...