United Electric Pressure Switch, 100 Series Type H100 Models 171 to 174
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100 Series Type H100 Models 171 to 174 Pressure Switch

Brand: United Electric Controls Ltd
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United Electric Pressure Switch, 100 Series Type H100 Models 171 to 174
The 100 Series is a cost-effective pressure and temperature switch for process plants and OEM equipment. 

The rugged, one piece enclosure features a slanted cover for wiring accessibility. A wide variety of microswitch and process-connection options make this versatile series ideal for applications requiring a rugged weather-proof mechanical switch.

Typical applications that utilize the 100 Series are heat tracing, freeze protection, processing equipment (pumps and compressors), inputs for annunciator panels, and fire suppression systems.
Features
  • Single Switch Output
  • Epoxy Coated and Gasketed Cast Aluminum Enclosure Type 4X
  • Tamper-Resistant Set Point “Lock”
  • Heat Trace and Freeze Protection Thermostats

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Specifications

Brand

Adjustment Type

  • Captive Clamp Screws
  • Factory Set (Pre-Set)
  • Set Point Adjustment

Ambient Temperature Range

  • -40° to 71° C (-40° to 160° F)

Applications

  • Fire Suppression System
  • Freeze Protection
  • Heat Tracing
  • Inputs for Annunciator Panel
  • OEM Equipment
  • Process Plants
  • Processing Equipment (Pumps, Compressors)

Approvals & Certifications

  • ATEX Directive (94/9/EC) II 1 G EEx ia IIC T6 Tamb: -50° to 60° C (-58° to 140° F)
  • CE
  • CRN
  • 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

Conduit Connection

  • 1/2” NPT Female

Deadband

  • psi: 0.1 to 3.5 (kPa: 0.69 to 24.13, Mbar: 6.9 to 241.3)

Diaphragm Material

  • 316L Stainless Steel

Electrical Connectors

  • 7/8” Diameter Knockout
  • Watertight Conduit Fitting, Connects 7/8” Hole to 1/2” NPT FemaleFitting

Electrical Contacts

  • Gold Contacts, 1 A at 125 Vac Resistive
  • Normally Closed
  • Normally Open

Electrical Rating

  • 0.5 A Resistive, 0.03 A Inductive at 125 Vdc
  • 2 A Resistive, 1 A Inductive at 24-30 Vdc
  • 20 A, 125/250/480 Vac Resistive
  • Close Deadband, 5 A at 125/250 Vac Resistive
  • External Manual Reset, 15 A at 125/250/480 Vac Resistive
  • High Ambient, Vapor Sealed Switch, 15 A 125/250 Vac Resistive

Enclosure Finish

  • Epoxy Powder-Coated

Enclosure, Body Material

  • Die Cast Aluminum

Environmental Protection

  • IP66
  • NEMA 4X
  • Typical 4X

Mounting

  • Pipe
  • Surface

NACE & NIST

  • NACE MR-0175 Compliant

Name Plate, Tag Material

  • Stainless Steel

NPT Connection

  • 1/4” NPT Female

Orifice Size

  • 0.72” (18.28 mm) for Clean-Out Purposes

Output

  • DPDT (Single Switch)
  • SPDT (Single Switch)

Overpressure & Static Pressure Limits

  • Overpressure - psi: 500 (kPa: 3,447, bar: 34.47)

Proof Pressure

  • psi: 1,000 (kPa: 6,895, bar: 68.9)

Repeatability

  • Set Point Repeatability: ± 1 % of Adjustable Range

Service

  • Oxygen Service Cleaning, Alcohol Cleaning to Remove Residue from the Process Connection

Set Point - Decreasing

  • bar: 0.1 to 13.8
  • kPa: 6.9 to 1,379
  • psi: 1 to 200

Set Point - Increasing

  • bar: 0.1 to 13.8
  • kPa: 6.9 to 1,379
  • psi: 1 to 200

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: 34.5
  • kPa: 3,447
  • psi: 500

Vibration

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

Documentation

Data Sheets

Catalogs

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