United Electric (UE) J120-S134B, Adjustable Pressure Switch, 30" Hg Vac to 20 PSI Set Point Range, 0.2 to 0.6" Hg Fixed Deadband, 20 PSI Over Range Pressure, 25 PSI Proof Pressure, Welded 316L SS Bellows, 1/2"NPT Female 316L SS Pressure Connection, Single SPDT 15A 125,250,480 VAC Resistive, Internal Adjustment, Hazardous Location Explosion-Proof Pressure Switch, Class I, Division 1 and 2, Groups B, C & D, ATEX, Nema 4X Weatherproof Pressure Switch