How to Use an Air Conditioning Pressure Gauge?

[RicardoDella]

Usage method of air conditioning pressure gauge: The gauge typically has two dials, one blue and one red. The blue dial indicates low pressure, while the red one shows high pressure. Under normal operating conditions of the air conditioning system, the low pressure should range between 1.0 to 2.5 bar, and the high pressure between 15 to 18 bar, with slight deviations possible in actual readings. The working principle of the air conditioning pressure gauge is that when the system pressure exceeds or falls below the rated safe pressure, the disc inside the sensor moves instantly. This movement drives the switch connector to connect or disconnect via the connecting rod. When the pressure drops or rises back to the rated recovery value, the disc resets instantly, and the switch automatically returns to its original position. The free end of the elastic element generates displacement, which directly or after comparison pushes the switch component, altering its on/off state to achieve the purpose of controlling the measured pressure.