Schneider Electric,PRESSURE SWITCH 575VAC 1HP F +OPTIONS,0.25 inch NPT external conforming to UL 508,100...200 psi,200 psi,40 psi,off at 175 psi,2-way pressure release valve-maintained manual cut-out lever (AUTO-OFF)-addition of a second ground screw,air (-22...257 ..F),control small electrically driven air compressors