Cameron Big Hermet Pressure Switch
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Big Hermet Pressure Switch

Brand: Cameron
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Big Hermet pressure switches are robust field-mounted instruments.

The pressure sensing assembly is identical to a conventional Static "O" Ring type.

The main difference is that the switching element assembly is hermetically sealed in a steel capsule. Switching elements are SPDT or DPDT.
Features
  • Built-In quality 
  • Explosion-proof hermetically sealed switching element capsule 
  • UL Listed, CSA certified approved models 
  • Field adjustable set points 
  • Instrument quality 
  • Robust construction 
  • Cost effective 

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Specifications

Brand

Ambient Temperature Range

  • -40° to 75° C (-40° to 167° F)

Applications

  • Hydraulic Applications
  • Process Applications

Approvals & Certifications

  • ATEX Approved EEx d IIC T4, T5, & T6
  • CSA - Class I, Groups A, B, C, D, Class II, Groups E, F, G, Div. 1 & 2
  • ISO 9001
  • SAA
  • UL

Approvals & Certifications

  • Calibration
  • Compliance/Conformance
  • Dielectric Test
  • Hydrostatic Pressure Test
  • Inspection Report
  • Insulation Resistance
  • Typical Material of Wetted Parts

BSP Connection

  • 1/2” BSPT Female
  • 1/4” BSPT Female

Conduit Connection

  • 3/4” NPT Female

Deadband

  • psi: 0.2 to 150 (kPa: 1.379 to 1,034, bar: 0.013 to 10.3)

Deadband, Approximate - Vacuum

  • Inch WC: 1.4 to 1.6
  • Inches Hg: 0.7 to 2.1
  • psi: 0.050 to 1.015 (kPa: 0.35 to 7 Mbar: 3.5 to 70)

Diaphragm Material

  • 316L Stainless Steel
  • Buna-N
  • Carpenter 20
  • Ethylene Propylene (EPR)
  • Fire-Safe Welded
  • Flush
  • Hastelloy B
  • Hastelloy C
  • Kalrez
  • Monel
  • Neoprene
  • Tantalum
  • Teflon-Coated Polyimide
  • Viton
  • Welded

Electrical Connectors

  • 18 AWG Color-Coaded Standard Wire Leads
  • M20 x 1.5 Female

Electrical Contacts

  • Normally Closed
  • Normally Open

Electrical Rating

  • 0.4 A at 125 Vdc
  • 0.5 A at 125 Vdc
  • 1 A at 125 Vac
  • 1 A at 30 Vdc
  • 15 A at 250 Vac
  • 5 A at 250 Vac
  • 5 A at 30 Vdc

Enclosure Finish

  • Epoxy Coated
  • Fungicidal Varnish

Enclosure, Body Material

  • Carbon Steel
  • Stainless Steel

Environmental Protection

  • Explosion-proof
  • IP65
  • NEMA 4
  • NEMA 4X
  • Weathertight

Materials of Construction

  • Tag & Nameplate: Stainless Steel

Media

  • Air
  • Non-Corrosive Process Applications
  • Oil
  • Water

Mounting

  • Pipe

NACE & NIST

  • NACE MR-0175, ISO 15156

NPT Connection

  • 1” NPT Female
  • 1” NPT Male
  • 1/2” NPT Female
  • 1/4” NPT Female
  • 2” NPT Female
  • 3/4” NPT Male

Nut & Bolt Material

  • Adjusting Nut: Stainless Steel

O-Ring Material

  • AFLAS
  • Buna-N
  • EPR Ethylene Propylene
  • FFKM
  • Fire-Safe
  • Kalrez
  • Neoprene
  • Teflon Coated Polyimide
  • Viton
  • Viton GLT

Overpressure & Static Pressure Limits

  • psi: 200 to 5,000 (kPa: 1,379 to 34,470, bar: 13.79 to 344.7)

Process Connection Material

  • 316 Stainless Steel
  • Brass
  • Copper-Free Aluminum
  • Hastelloy B
  • Hastelloy C
  • Kynar
  • Monel
  • PVC
  • Titanium

Proof Pressure

  • psi: 400 to 6,000 (kPa: 2,758 to 41,370, bar: 27.58 to 413)

Proof Pressure - Vacuum

  • psi: 391.6 to 2,538 (kPa: 2,700 to 17,500, bar: 27 to 175)

Set Point - Decreasing

  • bar: 0 to 275.8
  • kPa: 0 to 27,580
  • psi: 0 to 4,000

Set Point - Increasing

  • bar: 0 to 275.8
  • kPa: 0 to 27,580
  • psi: 0 to 4,000

Switch Type

  • DPDT
  • SPDT

Temperature Range

  • O-Ring Material: -34° to 204° C (-30° to 400° F)

Documentation

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