Mercoid DA-31-153-7 pressure switch, brass Bourdon tube, range 5-150 psig, 6 psig min. deadband. Wetted Materials: Brass, 403 SS, or 316 SS. Temperature Limit: 180°F (82°C). Pressure Limit: Maximum pressure of the operating range. Enclosure Rating: General purpose, weatherproof or explosion-proof. Repeatability: ±1% of full operating range, ±1.5% on DS-7300 models. Switch Type: SPST mercury switch, SPDT mercury switch, SPDT snap switch, or SPDT hermetically sealed snap switch. Other circuit types available. Electrical Rating: See Catalog page. Electrical Connections: Screw terminal. Conduit Connection: General purpose: 1/2″ hole for conduit hub. Weatherproof: 1/2″ conduit hub. Explosion-proof: 3/4″ female NPT. Process Connection: General purpose and weatherproof: 1/4″ male NPT; 1/2″ male NPT on range 15S and 16S. Explosion-proof: 1/2″ male NPT and 1/4″ female NPT. Mounting Orientation: Vertical. Set Point Adjustment: Thumbscrew. Weight: General purpose: 4 lb (1.8 kg). Weatherproof: 6 lb (2.7 kg). Explosion-proof: 8 lb (3.5 kg). Deadband: See Catalog page. Agency Approvals: CE, UL, CSA, FM. (Mercury switch units are not CE approved). (Consult factory for which models have what approvals.)
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