United Electric (UE) J21K NEMA 4X General Service Differential Pressure Switches

The UE J21K differential pressure switch maintains the difference between two system pressures or vacuums, senses excessive flow deviation, or verifies that a filter is clogged. It is designed with two separate opposing sensors that are connected by a rod to actuate the snap switch.

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

Key Specifications

  • Adjustable Ranges Within 30" HgVacD to 90 PSID
  • Single SPDT Switch Output
  • UL Listed and CSA Certified
  • Welded 316 Stainless Steel Sensors
  • Repeatability ±1% Adjustable Range
  • Models Available from Stock

Supporting Documentation
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Type Description Size
Lesman switch catalog PDF Lesman Catalog Section: Pressure and Temperature Switches 1.6MB
UE Switch PDF United Electric Switches Application Datasheet Faxback Form 16KB
UE Choosing a Mechanical Switch PDF United Electric's Guide to Choosing a Mechanical Switch 136KB
Adobe PDF United Electric J21K NEMA 4X General Service Differential Pressure Switch Specifications 376KB
Adobe PDF United Electric J21K NEMA 4X Differential Pressure Switch Installation and Maintenance Guide 211KB

Last Ed. Date: 08/24/2017 04:57 PM