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  2. UE Controls J21k Differential pressure switch Model S127B-S150B

UE Controls J21k Differential pressure switch Model S127B-S150B

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Welded 316L stainless steel bellows with 1/2” NPT (female) pressure connections.

The J21K Series is simple to install and operate for alarm, safety and emergency shutdown applications requiring a higher switch sensitivity. It monitors the difference between two system pressures or vacuum using sealed, opposing bellows sensors.

  • Pressure parameters .

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United Electric Controls
Interruptores de presion, interruptores de temperatura, Termocuplas, RTDs, transmisores de temperatura y presioón, detección de gases

The J21K's rugged design - with epoxy coated enclosure and sealed metal bellows - lends itself to exacting applications. Widely used in refrigeration (chiller) and compressor applications, the J21K can be used for filter status monitoring and proof of flow.



Specifications for UE Controls J21k Differential pressure switch Model S127B-S150B

Pressure parameters . S127B -Set Point Range: 30 "Hg Vac to 0 psi /Deadband: 0.4 to 0.6 "Hg / Differential Proof pressure: 15 psid / Working pressure: 30 "Hg Vac to 0 psi or S140B -Set Point Range: 0 to 6 psi /Deadband: 0.1 to 0.4 psi / Differential Proof pressure: 6 psid / Working pressure: 30 "Hg Vac to 30 psi or S150B -Set Point Range: 1 to 15 psi /Deadband: 0.1 to 0.6 / Differential Proof pressure: 15 psid / Working pressure: 30 "Hg Vac to 125
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  • Designed to meet Enclosure Type 4X (with watertight conduit fitting)
  • UL listed and cUL certified
  • Optional ATEX and Rostechnadzor (GOST-R) intrinsic safety compliance
  • Optional adjustable deadband
  • Single switch output
  • Opposing bellows design


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UE Controls J21k Differential pressure switch Model S127B-S150B