3818-00004 Pressure Sensor Switch Assembly

The 3818-00004 pressure sensor switch functions as a critical safety and control component within bus air conditioning refrigerant circuits. It monitors high-side and low-side pressure thresholds to prevent compressor damage due to overpressure or underpressure conditions. The switch activates or deactivates the compressor clutch circuit based on calibrated pressure set points. Constructed with brass or stainless steel fitting and sealed electrical connector for vibration resistance in heavy-duty commercial vehicle applications.