The 400 Series is simple to install and operate, providing end-users multi-output alarm, safety and emergency shutdown functionality. It carries global agency certification. As an electromechanical switch, it can safely operate independently of the control system and switch reliably when called upon, free from potential communication errors or cyber concerns.

Typical applications that utilize the 400 Series include regulating industrial gas production, and controlling assets like pumps, turbines, and compressors.

400 Series Pressure and Temperature Switch Features

• Low and/or high limit alarm and safety shutdown via one, two or three independent switches, separated up to 100% of range
• Quick and easy installation with ample access to wiring compartment and simple set point adjustment using reference dial or calibrated gauge
• Application versatility achieved through a variety of ranges, microswitches, sensors and process connections
• Replaces a switch and a gauge in differential pressure applications when using optional visual indication
• FM-approved, NEMA 4X, multiple SPDT/DPDT switch output
• 1, 2 & 3 switch outputs
• Epoxy-coated enclosure designed to meet enclosure type 4X
• Wide variety of pressure sensors and materials
• Setting via reference dial or hex screw adjustment
• UL listed and cUL certified. FM approved.
• Adjustable Ranges:
  • "WC ranges: 300 "wc vacuum to 250 “wc pressure (-746,7 to 622,3 mbar)
  • Pressure: 30 “Hg Vac to 6000 psi (-1,0 to 413,7 bar)
  • Differential Pressure: 1"wcd to 200 psid (2.5 mbar to 13,8 bar)
• Temperature: -125 to 650 °F (-87.2 to 343.3 °C)
• CE compliant to low voltage directive and pressure equipment directive.
• Optional ATEX or EAC intrinsic safety compliance.

400 Series Pressure and Temperature Switch Specifications

• Ambient Temperature Limits: -40 to 160°F (-40 to 71°C); set point typically shifts less than 1% of range for a 50°F (28°C) ambient temperature change
• Shock: Set point 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
• Enclosure Classification: Designed to meet enclosure type 4X requirements
• Switch Output: One, two or three SPDT switches, may be separated up to 100% of range except models 521-524, 531-534: 50%; models 520, 525, 530, 535, 570-572: 30%; switches may be wired “normally open” or “normally closed”
• Electrical Rating: 15 A 125/250/480 VAC resistive. Electrical switches have limited DC capabilities; at 24-30 VDC, 2A resistive and 1A inductive; at 125 VDC, 0.5A resistive and 0.03A inductive.
• Weight: Approx. 3 to 7.5 lbs.; varies with model
• Electrical Connection: One 3/4” NPT and two 7/8” diameter knockouts
• Pressure Connection: All models 1/4” NPT (female) except models S126B-S164B, 520-535: 1/2” NPT (female); models 540-547: 1/8" NPT (female)
• Fill: Temperature Models: Non-toxic oil filled

400 Series Pressure and Temperature Switch Industries

• Water/Wastewater
• OEM Solutions
• Power

Download United Electric Controls 400 Series Pressure and Temperature Datasheet

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