Series details

Compact limit switch box, designed for hazardous areas, provides a visual and electrical remote position feedback on automated valves.

Available in either die-cast aluminum, the explosion proof enclosure matches the Ex d IIC T6 standards. The SK switch box series offer a ready to mount solution thanks to the integrated Namur mounting kit.

The ideal compact solution for the Oil and Gas, both onshore and offshore, and Petrochemical industries.


  • Twin shaft design, ensuring a complete sealed device. The shaft is splitted in two parts, each fitted and sealed into the body and cover for the best weather insulation even during opening operation.
  • Two cable entries, either metrics or imperial.
  • Enhanced corrosion resistance thanks to the thick polyester powder coating on aluminum housings.
  • Easy wiring through the terminal PCB board
  • NOVA™ V3 switch option ensures extreme durability and high power switching capabilities
  • Concentric flame path design providing a self-centering system aligning shafts for a precise engagement.
  • Captive bolts on the screwed lid.
  • Technical Data:


  • Die-cast aluminum body and cover with polyester powder coating
  • Stainless steel fasteners and shafts
  • Approvals:


    Ex II 2GD  Ex d IIC T4/T5/T6 Gb

    Ex tb IIIC T135/T100/T85°C Db

    Ta:  -55°C≤Ta≤105°C/80°C/60°C


    Class I Division1 Groups B,C,D  Division2 Groups A,B,C,D

    Class II Division1 Groups E,F,G Division2 Groups F,G

    SIL certificate:

    Up to SIL 3 certified by TUV

    Protection rating:

    IP 66 / 67

    IP 66 / 68  up to 15 meters for 100 hours

    Cable entries options:

    Two cable entry M20 or 1/2" NPT


    Standard operating temperature -20°C +80°C Lower and higher temperature options available on request.