Schneider Electric 9013FHG42XZ22 pressure switch controls air compressor motors by closing the circuit at 135 PSI and opening it at 175 PSI. Built as part of the Square D 9013FHG series, the unit mounts directly onto compressor tanks or manifolds and carries the electrical load for the motor circuit without an external relay in most single-phase setups. The fixed differential between cut-in and cut-out pressures prevents short cycling while maintaining tank pressure within the stated range for typical workshop and light industrial compressors.
