Designed for applications in hazardous atmospheres, PSW-400 Series Pressure Switches offer complete reliability due to a rugged, die-cast aluminum enclosure with waterproof gaskets and two separate chambers for electronics and actuator. Single or dual setpoints are available, with all critical parts made of stainless steel. In addition, the PSW-400 Series employs vibration-resistant setpoints and a calibrated scale.
SPECIFICATIONS Approval: UL listed, Class I, Divisions 1 and 2, Groups B, C, D. Class II, Divisions 1 and 2, Groups E, F, G CSA certified Storage Temp.: -29 to 65°C (-20 to 150°F) Ambient Temp. Limits: -29 to 65°C (-20 to 150°F) Process Temp. Limits: SS: 149°C (300°F) Buna-N: 65°C (150°F) Enclosure Classification: NEMA-7, -9 hazardous location, explosion proof, dust ignition proof Setpoint Repeatability: ±1% of range Switch Output: 1 or 2 SPDT switch can be wired "normally open" or "normally closed" Electrical Rating: 10 A: 125/250 Vac; 0.5 A: 125 Vdc; 0.25 A: 250 Vdc; 15 A: 125/250 Vac. Optional hermetically sealed 5 A: 125/250 Vac Enclosure: Dual chamber epoxy-coated cast aluminum, gasketed Electrical Connection: 2 ea. 3/4 NPT electrical conduit hubs Pressure Connection: 1/4 NPT female; vacuum to 600 psi; 1/2 NPT; Male 1/4 NPT female for 1000 to 3000 psi Connection Material: Vacuum thru inches H2O ranges; carbon steel All psi ranges; 316 SS Dimensions: psi ranges: 206 (max) H x 140 W x 70 mm D (from Center line) (7.1 H x 5.5 W x 2.8" D from Center Line) inH2O ranges: W & D = 140 mm (5.5") Weight: 2.7 kg (6 lb)