The difference in case colors of pressure gauges for special gases

Gas pressure gauges are used to measure the pressure of various gas media. Due to the special characteristics of some gases, it is necessary to use the corresponding pressure gauge. These pressure gauges are usually marked with the corresponding gas logo, sometimes the color of the pressure gauge casing is also different:

The case of oxygen pressure gauge is usually sky blue.

The case of hydrogen pressure gauge is usually dark green.

The case of ammonia pressure gauge is usually yellow;

The case of chlorine pressure gauge is usually brown;

The case of acetylene pressure gauge is usually white.

The case of other flammable gas pressure gauges is red;

Other inert gas or liquid gauge cases are black.