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This range of switches features a robust high quality housing with 1 or 2 sealed SPDT microswitches and has been designed for use in environments where explosive gases can be present (e.g. gas fields, oil rigs & chemical plants etc).

Microswitches can be set for single, dual simultaneous, or dual independently adjustable operation. Environmentally sealed or hermetically sealed microswitch options are available.

One of the benefits of the Perseus range is the separation of the flameproof and adjustment chambers allowing adjustment of the set point with power on and the switch in operation. The housing is available with one or two electrical entries.
Features
  • 316 Stainless steel or black anodised aluminium switchcase to IP66 & IP67 standards
  • Wetted parts NACE MR-01-75 complaint
  • SIL 2 – IEC61508 proven reliability
  • Single or dual microswitch option
  • Settings from 4 to 800 bar
  • ATEX/IECEx Flameproof version II 2 G Ex db IIC T6...T5 Gb (Tamb -50° C to +75° C...+90° C) (with or without resistors)
  • ATEX/IECEx Intrinsically safe version II 1 G Ex ia IIC T6...T2 Ga (Tamb -50° to 78° C...93° C) (without resistors)
  • ATEX/IECEx Intrinsically safe II1G Exia IIC T5 .. T2 Ga (Tamb -50° to +72° C... +122° C (with resistors)
  • ATEX/IECEx Intrinsically safe version II 1 D Ex ia IIIC T135° C Da (Tamb -50° to 70° C) (with or without resistors)

Specifications

Accuracy

  • ± 1 % at 20° C

Set Point - Decreasing

  • bar: 4 to 800
  • kPa: 400 to 80,000
  • psi: 60 to 11,600

Set Point - Increasing

  • bar: 4 to 800
  • kPa: 400 to 80,000
  • psi: 60 to 11,600

NPT Connection

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

BSP Connection

  • 1/2” BSPP Female
  • 1/2” BSPP Male
  • 1/4” BSPP Female

Switch Type

  • 1 or 2 x SPDT

Electrical Connectors

  • 1/2” NPT Adaptor
  • M20
  • M25 Adaptor

Mocroswitch Rating

  • 2 A at 250 Vac Inductive
  • 3 A at 30 Vdc Inductive
  • 5 A at 250 Vac / 30 Vdc Resistrive

Enclosure, Body Material

  • Switchcase & Covers: 316 Stainless Steel
  • Switchcase: Black Anodised Aluminum

Seat / Seal Material

  • Seal: EPDM
  • Seal: Nitrile
  • Seal: PTFE
  • Seal: Viton

Wetted Materials

  • 316 Stainless Steel

Deadband

  • 0.5 to 60 bar

Operating Temperature

  • -50° to 150° C (-58° to 302° F)

Maximum System Pressure

  • psi: 1,000 (kPa: 6,900, bar: 69)

Environmental Protection

  • IP66
  • IP67

Ambient Temperature

  • -40° to 85° C (-40° to 185° F)
  • -50° to 125° C (-58° to 257° F) Optional

Storage Temperature

  • -50° to 85° C (-60° to 185° F)

NACE & NIST

  • NACE MR-0175

Approvals & Certifications

  • SIL 2
  • ATEX/IECEx

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