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Add the J21K Series Type J21K Model 357 Differential Pressure Switch to your store or catalog  
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United Electric Differential Pressure Switch, J21K Series Type J21K Model 357

J21K Series Type J21K Model 357 Differential Pressure Switch

Brand: United Electric Controls Ltd
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United Electric Differential Pressure Switch, J21K Series Type J21K Model 357 United Electric Differential Pressure Switch, J21K Series Type J21K Model 357
The J21K differential pressure switch monitors the difference between two system pressures or vacuums and senses excessive flow deviation, or verifies that a filter is clogged. 

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.
Features
  • Sealed metal bellows sensors
  • Welded 316 stainless steel sensors
  • Gasketed die-cast aluminum enclosure with epoxy coating
  • Single switch output
  • Adjustable ranges: 30" Hg vac to 90 psid (-1 to 6 bar)
  • 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

1 - 12 of 1,296 Part Numbers
J21K-357
J21K-357
  • Model - 357
  • Switch Option - Standard SPDT Switch
  • Factory Set Point - No Factory Set Point
  • Measurement Range - Standard psi or bar
  • Agency Approvals - Without Additional Approvals
  • Tag - No Tag
  • Cleaning - Without Cleaning
  • Electrical Connection - 7/8” Diameter Conduit Hole
J21K-357-0140
J21K-357-0140
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - No Factory Set Point
  • Measurement Range - Standard psi or bar
  • Agency Approvals - Without Additional Approvals
  • Tag - No Tag
  • Cleaning - Without Cleaning
  • Electrical Connection - 7/8” Diameter Conduit Hole
J21K-357-0140-M201
J21K-357-0140-M201
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - Factory Set One Switch
  • Measurement Range - Standard psi or bar
  • Agency Approvals - Without Additional Approvals
  • Tag - No Tag
  • Cleaning - Without Cleaning
  • Electrical Connection - 7/8” Diameter Conduit Hole
J21K-357-0140-M201-M277
J21K-357-0140-M201-M277
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - Factory Set One Switch
  • Measurement Range - kPa or MPa
  • Agency Approvals - Without Additional Approvals
  • Tag - No Tag
  • Cleaning - Without Cleaning
  • Electrical Connection - 7/8” Diameter Conduit Hole
J21K-357-0140-M201-M277-M405
J21K-357-0140-M201-M277-M405
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - Factory Set One Switch
  • Measurement Range - kPa or MPa
  • Agency Approvals - ATEX
  • Tag - No Tag
  • Cleaning - Without Cleaning
  • Electrical Connection - 7/8” Diameter Conduit Hole
J21K-357-0140-M201-M277-M405-M444
J21K-357-0140-M201-M277-M405-M444
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - Factory Set One Switch
  • Measurement Range - kPa or MPa
  • Agency Approvals - ATEX
  • Tag - Paper ID Tag
  • Cleaning - Without Cleaning
  • Electrical Connection - 7/8” Diameter Conduit Hole
J21K-357-0140-M201-M277-M405-M444-M550
J21K-357-0140-M201-M277-M405-M444-M550
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - Factory Set One Switch
  • Measurement Range - kPa or MPa
  • Agency Approvals - ATEX
  • Tag - Paper ID Tag
  • Cleaning - Oxygen Service Cleaning
  • Electrical Connection - 7/8” Diameter Conduit Hole
J21K-357-0140-M201-M277-M405-M444-M550-M900
J21K-357-0140-M201-M277-M405-M444-M550-M900
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - Factory Set One Switch
  • Measurement Range - kPa or MPa
  • Agency Approvals - ATEX
  • Tag - Paper ID Tag
  • Cleaning - Oxygen Service Cleaning
  • Electrical Connection - Converts 7/8” Hole to 1/2” NPT Watertight Conduit Fitting
J21K-357-0140-M201-M277-M405-M444-M900
J21K-357-0140-M201-M277-M405-M444-M900
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - Factory Set One Switch
  • Measurement Range - kPa or MPa
  • Agency Approvals - ATEX
  • Tag - Paper ID Tag
  • Cleaning - Without Cleaning
  • Electrical Connection - Converts 7/8” Hole to 1/2” NPT Watertight Conduit Fitting
J21K-357-0140-M201-M277-M405-M446
J21K-357-0140-M201-M277-M405-M446
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - Factory Set One Switch
  • Measurement Range - kPa or MPa
  • Agency Approvals - ATEX
  • Tag - Stainless Steel ID Tag & Wire Attachment
  • Cleaning - Without Cleaning
  • Electrical Connection - 7/8” Diameter Conduit Hole
J21K-357-0140-M201-M277-M405-M446-M550
J21K-357-0140-M201-M277-M405-M446-M550
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - Factory Set One Switch
  • Measurement Range - kPa or MPa
  • Agency Approvals - ATEX
  • Tag - Stainless Steel ID Tag & Wire Attachment
  • Cleaning - Oxygen Service Cleaning
  • Electrical Connection - 7/8” Diameter Conduit Hole
J21K-357-0140-M201-M277-M405-M446-M550-M900
J21K-357-0140-M201-M277-M405-M446-M550-M900
  • Model - 357
  • Switch Option - Gold Contacts, 1 A, 125 Vac Resistive
  • Factory Set Point - Factory Set One Switch
  • Measurement Range - kPa or MPa
  • Agency Approvals - ATEX
  • Tag - Stainless Steel ID Tag & Wire Attachment
  • Cleaning - Oxygen Service Cleaning
  • Electrical Connection - Converts 7/8” Hole to 1/2” NPT Watertight Conduit Fitting
1 - 12 of 1,296 Part Numbers

View_Details

Specifications

Brand

Ambient Temperature Range

  • -40° to 71° C (-40° to 160° F), Set Point Typically Shifts less than 1 % of Range for a 28° C (50° F) Ambient Temperature Change

Applications

  • Refrigeration (Chiller) & Compressor

Approvals & Certifications

  • ATEX Ex directive (94/9/EC) II 1 G EEx ia IIC T6, Tamb: -50° to 60° C (-58° to 140° F)
  • CE
  • CSA C22.2, No. 24 File E42272
  • GOST R 51330.0, 51330.1, 51330.10 & 51330.14
  • Low Voltage Directive (LVD) 73/23/EC & 93/68/EEC
  • PED: 97/23/EC
  • UL (C,US) 508

Approvals & Certifications

  • ISO 9001

Conduit Connection

  • 1/2" NPT Fitting

Deadband

  • psi: 2 to 4 (kPa: 13.8 to 27.6, bar: 0.1 to 0.3)

Electrical Connectors

  • 7/8" Diameter Conduit Hole

Electrical Contacts

  • Normally Closed
  • Normally Open

Electrical Rating

  • 1 A at 125 Vac Resistive
  • 15 A at 125/250/277 Vac Resistive
  • 15 A at 125/250/480 Vac Resistive
  • 5 A at 125/250 Vac Resistive

Enclosure Finish

  • Epoxy Powder-Coated

Enclosure, Body Material

  • Gasketed Die Cast Aluminum

Environmental Protection

  • IP66
  • NEMA 4X

NPT Connection

  • 1/4" NPT Female

Operating Pressure

  • psi: -14.7 to 350 (kPa: -101.4 to 2,413, bar: -1 to 24.1)

Process Connection Material

  • 316L Stainless Steel

Proof Pressure

  • Differential Proof Pressure - psid: 70 (kPa: 482.6, bar: 4.8)

Repeatability

  • ± 1 % of Full Scale Range

Set Point - Decreasing

  • bar: 0 to 4.8
  • kPa: 0 to 482.6
  • psi: 0 to 70

Set Point - Increasing

  • bar: 0 to 4.8
  • kPa: 0 to 482.6
  • psi: 0 to 70

Shock

  • Set Point Repeats after 15 G, 10 ms Duration

Storage Temperature

  • -54° to 71° C (-65° to 160° F)

Switch Type

  • SPDT (BZ-R814-P4)

System Pressure

  • bar: 24.13
  • kPa: 2,413
  • psi: 350

Vibration

  • Set Point Repeats after 2.5 G, 5 to 500 Hz

Documentation

Data Sheets

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