Honeywell Pressure Switch, 5000 Series, Silver - Plated Copper Contacts, Contact Setting Range 1 PSI to 3 PSI, Operating Pressure 1400 PSI, Diaphragm EPDM, Operating Temperature -40 oC to 120 oC [-40 oF to 250 oF], Electrical Terminals 8 - 32 X 1/4 Screw, Connector 1/8 -27 NPT Male Thread.