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Explosion proof limit switches suitable for hazardous area Zone 1 & Zone 21

Ex db / Ex tb – IP66

These switches have simple and rugged construction, compact size with the possibility of entry and branching on the three sides of the enclosure. They are complete with two plugs for closing unused entries. Wide range of actuators in metal or in self-estinguishing glass-fiber-reinforced polymer (GFRP). They can be used to control gates, protections, carters and any moving mechanical parts.

The key-lock versions have a Stainless Steel operating key to be fixed to the mobile part of the protection. When opening the protection the key is removed from the switch and a mechanism ensures the positive opening of the electric contact.

The versions for hinges with positive opening positively opens the contacts when exceeding a rotation of a few degrees, immediately releasing the stop signal. 


  • Type of protection: Ex db / Ex tb

  • Degree of protection: IP66

  • Certified for:

    • Gas group IIB+H2
    • Dust group IIIC
  • Max range ambient temperature: -50°C ÷ +60°C

  • Material used: Aluminum light alloy

  • Max rated voltage: 500 Vac / 600 Vdc

  • Max rated current: 10 A

  • Entries Threading: NPT ANSI B1.20

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