Best Seller | DWYER INSTRUMENTS 1638-1 Large Diaphragm Pressure Switch Large Diaphragm Pressure Switch, Application Air Conditioning, Duct Heater Control, Industrial HVAC, Contact Form SPDT, Electrical Connection Type Screw Terminals, Electrical Rating 1/4 HP @ 250 V AC, 60 Hz, 1/8 HP @ 125 V AC, 15 A @ 120 to 480 V AC,... ... more DWYER INSTRUMENTS 1638-1 Large Diaphragm Pressure Switch Large Diaphragm Pressure Switch, Application Air Conditioning, Duct Heater Control, Industrial HVAC, Contact Form SPDT, Electrical Connection Type Screw Terminals, Electrical Rating 1/4 HP @ 250 V AC, 60 Hz, 1/8 HP @ 125 V AC, 15 A @ 120 to 480 V AC,... | | $551.99 go to store |