Dwyer ADPS-04-1-N is a differential pressure switch suitable for air and non-combustible gases. It operates within a temperature range of -4 to 185°F (-20 to 85°C) and has an enclosure rating of NEMA 3 (IP54). The switch features push-on screw terminals for electrical connections and can be mounted vertically with pressure connections pointing downwards. It has a maximum operating pressure of 40" w.c. (10 kPa) and a single-pole double-throw (SPDT) switch type. The switch has a mechanical working life of over 106 switching operations and an electrical rating of up to 1.5 A res./0.4 A ind./250 VAC, 50/60 Hz.