The PSW-850 is a simple, economical control for processes which require multiple switching capabilities. Dual or triple-switch controls provide multi-outputs in applications such as alarm and shutdown, pre-alarm and alarm, high/low limit or level staging functions.
Triple-switch models have been used for liquid level control. In this application, three pressure settings correspond to "pumping out" elevations in a sump pump.
SPECIFICATIONS Approvals: UL, CE Compliant Storage Temperature: -54 to 71°C (-67 to 158°F) Ambient Temperature: -40 to 70°C (-40 to 160°F)
except model PSW-852A: -40 to 70°C (0 to 160°F) Ambient Temperature Effect: less than 1% of range for 30°C (54°F) change Set point repeatability: ±2% of adjustable range (3% for PSW-852E) Shock: setpoint repeats after 15 g, 10 millisecond duration Vibration: set point repeats after 2.5 g, 5-500 Hz Enclosure: Die cast aluminum, epoxy powder coated, gasketed, captive cover screws Dimensions: 150 H (max) x 125 W x 140 D (5.9 x 4.9 x 5.5") Enclosure Classification: Complies with NEMA-1 requirements Switch Output: Two or three SPDT; setpoints may be separated up to 100% (30% for PSW-852A and PSW-852B) Electrical Rating: 15 amp 125/250/480 Vac resistive Weight: approx. 1.4 to 3.4 kg (3 to 7.5 lb) (varies with model) Electrical Connection: Three 22 mm ( 7/8") diameter knockouts Pressure Connection: 1/4 NPT Female, (1/2 NPT Female on PSW-852A)
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