United Electric Pressure Switch, 100 Series Type H100 Models 270 & 274
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100 Series Type H100 Models 270 & 274 Pressure Switch

Brand: United Electric Controls Ltd
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United Electric Pressure Switch, 100 Series Type H100 Models 270 & 274
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: 1 to 10 (kPa: 6.895 to 68.95, bar: 0.1 to 0.7)

Electrical Connectors

  • 7/8” Diameter Knockout
  • 7/8” Hole to 1/2” NPT Female Watertight Conduit Fitting

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
  • 10 A at 125 Vdc Resistive
  • 2 A Resistive, 1 A Inductive at 24-30 Vdc
  • 20 A, 125/250/480 Vac Resistive
  • 30 A, 125/250/277 Vac Resistive
  • Adjustable Deadband, External Manual Reset, 15 A at 125/250/480 Vac Resistive
  • Close Deadband, 5 A at 125/250 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

  • Intrinsically Safe
  • IP66
  • Typical 4X

Indication

  • Red Status Light, 115 Vac

Mounting

  • Pipe
  • Surface

Name Plate, Tag Material

  • Stainless Steel, Paper ID Tag & Wire Attachment

NPT Connection

  • 1/4” NPT Female

Overpressure & Static Pressure Limits

  • Overpressure - psi: 200 to 300 (kPa: 1,379 to 2,068, bar: 13,8 to 20,7)

Pressure Type

  • Gauge

Process Connection Material

  • Phosphor Bronze Bellows with Nickel-Plated Brass

Proof Pressure

  • psi: 250 to 350 (kPa: 1,724 to 2,413, bar: 17.2 to 24.1)

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: 0.3 to 20.7
  • kPa: 27.57 to 2,068
  • psi: 4 to 300

Set Point - Increasing

  • bar: 0.3 to 20.7
  • kPa: 27.57 to 2,068
  • psi: 4 to 300

Shock

  • Set Point Repeats after 15 G, 10 millisecond Duration

Storage Temperature

  • -54° to 71° C (-65° to 160° F)

Switch Type

  • DPDT, 10 A at 125/250 Vac Resistive
  • 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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