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Instantly add the J21K Series Type J21K Models S127B to 16021 Differential Pressure Switch and 50,000+ more product series to your store or catalog  
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United Electric Differential Pressure Switch, J21K Series Type J21K Models S127B to 16021

J21K Series Type J21K Models S127B to 16021 Differential Pressure Switch

Brand: United Electric Controls Ltd
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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 5,184 Part Numbers
J21K-16021
J21K-16021
  • Model - 16021
  • 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-16021-0140
J21K-16021-0140
  • Model - 16021
  • 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-16021-0140-M201
J21K-16021-0140-M201
  • Model - 16021
  • 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-16021-0140-M201-M277
J21K-16021-0140-M201-M277
  • Model - 16021
  • 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-16021-0140-M201-M277-M405
J21K-16021-0140-M201-M277-M405
  • Model - 16021
  • 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-16021-0140-M201-M277-M405-M444
J21K-16021-0140-M201-M277-M405-M444
  • Model - 16021
  • 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-16021-0140-M201-M277-M405-M444-M550
J21K-16021-0140-M201-M277-M405-M444-M550
  • Model - 16021
  • 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-16021-0140-M201-M277-M405-M444-M550-M900
J21K-16021-0140-M201-M277-M405-M444-M550-M900
  • Model - 16021
  • 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-16021-0140-M201-M277-M405-M444-M900
J21K-16021-0140-M201-M277-M405-M444-M900
  • Model - 16021
  • 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-16021-0140-M201-M277-M405-M446
J21K-16021-0140-M201-M277-M405-M446
  • Model - 16021
  • 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-16021-0140-M201-M277-M405-M446-M550
J21K-16021-0140-M201-M277-M405-M446-M550
  • Model - 16021
  • 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-16021-0140-M201-M277-M405-M446-M550-M900
J21K-16021-0140-M201-M277-M405-M446-M550-M900
  • Model - 16021
  • 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 5,184 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

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. 14 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

Deadband

  • psi: 0.1 to 0.7 (kPa: 0.69 to 4.83, Mbar: 6.9 to 48.3)

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: Watertight Conduit Fitting, Converts 7/8” Hole to 1/2” NPT Fitting

NPT Connection

  • 1/2” NPT Female

Operating Pressure

  • psi: -14.7 to 300 (kPa: -101.4 to 2,068, bar: -1 to 20.68)

Process Connection Material

  • Welded 316L Stainless Steel Bellows

Proof Pressure

  • psi: 6 to 300 (kPa: 41.37 to 2,068, bar: 0.41 to 20.68)

Repeatability

  • ± 1 % of Full Scale Range

Set Point - Decreasing

  • bar: -1 to 1
  • Inches Hg: -30 to 0
  • kPa: -101.4 to 103.4
  • psi: -14.7 to 15

Set Point - Increasing

  • bar: -1 to 1
  • Inches Hg: -30 to 0
  • kPa: -101.4 to 103.4
  • psi: -14.7 to 15

Shock

  • Set Point Repeats after 15 G, 10 millisecond Duration

Storage Temperature

  • -54° to 71° C (-65° to 160° F)

Switch Type

  • One SPDT Snap-Action Switch

System Pressure

  • bar: 20.68
  • kPa: 2,068
  • psi: 300

Vibration

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

Documentation

Data Sheets

Catalogs

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