Our company provides Pressure Switch Type PS - PSU. It is a triple pole device, which is more elegant housing, modified design & with a user-friendly over-riding switch. This type of switch cut off a 3-phase power supply when the pressure increases to a current value and cut off the power supply when the pressure falls to another preset value. Both cut off pressures and cut pressure is independently adjustable. This type of switch additionally provided with a relief valve, which make sure load free starting of the compressor. Pressure Switch Type PS - PSU can be used by manufacturers of small air compressors & domestic water pressurization systems, etc.