United Electric (UE) H121K-157, Adjustable Pressure Switch, 10 to 100 PSID Set Point Range, 0.5 to 3 PSI Fixed Deadband, 30"Hg Vac to 150 PSI Working Pressure, 180 PSI Proof Pressure, Brass Bellows, 1/4"NPT Female Nickel-Plated Brass Pressure Connection, Single SPDT 15A 125,250,480 VAC Resistive, External Adjustment, Hazardous Location Explosion-Proof Pressure Switch, Class I, Division 1 and 2, Groups B, C & D, ATEX, Nema 4X Weatherproof Pressure Switch
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