Series details

Heavy-duty limit switch boxes, designed for hazardous areas, provide a visual and electrical remote position feedback on automated valves.

Available in die cast aluminum matching the Ex d IIB T6 standards. The SX is our solution reaching  Ex d IIB T6 requirements.  Thanks to spare pass through terminals, the three cable entries either metrics or imperial and different visual position indications, provide a highly customizable solution meeting a wide range of applications. These including, but not limited to, the Oil and Gas, both onshore and off shore, 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.
  • Enhanced flexibility of electrical feedbacks options.
  • Up to three cable entries available in different sizes.
  • Easy wiring through the terminal PCB board
  • NOVA V3™ switch option ensures extreme durability and high power switching capabilities
  • 4-20 mA position transmitter options
  • Single tool opening design, allowing the operator to unscrew the lid by hand after removing the locker
  • 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 IIB T4/T5/T6 Gb

    Ex tb IIIC T135/T100/T85°C Db

    Ta:  -20°C≤Ta≤105°C/75°C/60°C


    Class I   Division 1 Groups B,C,D   Division 2 Groups A,B,C,D

    Class II  Division 1 Groups E,F,G   Division 2 Groups F,G

    SIL certificate:

    Up to SIL 3 certified by TUV

    Protection rating:

    IP 66 / 67

    Cable entries options:

    Up to three cable entries from the following sizes

  • M20 x 1,5
  • M25 x 1,5
  • 1/2" NPT
  • 3/4" NPT
  • Temperature:

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