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

Ex db / Ex tb – IP66/IP67

These switches have a 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 an operating key to be fixed to the mobile part of the protection. The key is removed from the switch when opening the protection and a mechanism ensures the positive opening of the electric contact. Possibility to operate the switch with a key allowing the restart only by inserting the same key.

The cable operated versions make possible to stop the machine from any point of intervention by manually pulling the cable. Self-diagnostic for the correct operation of the unit by opening the contacts in case of cable loosening or breakage detection. The version with reset includes the indicator of correct tension of the cable as well as a mechanical indicator of the status of the contacts. Contacts remain open after the intervention even if the cable is released.


  • Type of protection: Ex db / Ex tb

  • Degree of protection: IP66/67

  • Certified for:

    • Gas group IIC
    • 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

  • Weight: 450 g

Other options available:

Stainless Steel limit switches PSI for hazardous area

PSI – Stainless Steel limit switches

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