Differential Pressure Switch Contact Form SPDT Electrical Connection Type Screw Terminals Electrical Rating 1/4 hp @ 250 V AC 60 Hz 10 A 15 A @ 120 to 480 V AC 60 Hz Resistive 1/8 hp @ 125 V AC Housing Type Conduit Box Input Voltage 120 to 480V AC 125V AC 250V AC Maximum Differential Pressure Setting 85 in wc Maximum Operating Temperature 180 Degrees F Maximum Pressure Rating 25 psig Maximum Pressure Setting 85 in wc Minimum Differential Pressure Setting 9 in wc