Hazardous Location Switches - Wireless Option

Featured Product from Honeywell Sensing & IoT

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When conditions are hazardous and performance is critical, customers turn to Honeywell's MICRO SWITCH™ Limit Switches and Limitless™ Wireless Solutions.

Honeywell's MICRO SWITCH Hazardous Location Limit Switches are designed specifically for dangerous indoor or outdoor locations where potentially explosive gases may be present and where reliability and repeatability are essential. To comply with explosion-proof requirements, the flame path within the switch housing is designed to contain and cool escaping hot gases - fumes that otherwise could cause an explosion outside the switch.

Honeywell's newly introduced Limitless™ WBX Series combines the best of Honeywell's MICRO SWITCH™ Hazardous Location Limit Switches with a 802.15.4 point-to-point (P2P) wireless network - adding wireless capabilities by incorporating a radio board and battery power. It is available with a variety of remote or built-in antenna options.

Wireless-enabled limit switches can be used for position sensing and presence/absence detection for an endless number of applications - especially where wiring or wire maintenance is not physically possible or economically feasible. Combining this greater flexibility with proven harsh-duty packaging can result in increased efficiencies and improved safety for machines, equipment, and operators.


  • Designed specifically for dangerous indoor or outdoor locations
  • Superior reliability and repeatability
  • Explosion-proof design contains flame path to contain and cool escaping hot gases
  • UL, CSA, ATEx and IEC Ex, INMETRO, EAC, CE, & NEPSI certifications
  • O-ring seals render switches weather-proof, water-tight, and dust-tight
  • Options include non-sparking actuators, captive cover screws, grounding screws, silver/gold contacts
  • Smallest UL-housing available for use in hazardous locations


  • Wireless design for remote control and monitoring: Radio (license-free, global) WPAN 802.15.4 (IEEE802.15.4), 2.4 GHz, P2P. Up to 305 m [1000 ft] line-of-sight communication range (monitor sold separately)
  • AES 128 bit encryption: for a secure network
  • IP67 (self-certified), NEMA 4 sealed metal enclosure
  • Powder-coated aluminum housing for enhanced durability and corrosion resistance.
  • cULus, ATEX, IEC Ex certifications
  • Easily add, subtract, reconfigure or relocate switches
  • No wires to pinch - Eliminates issues with wire connection integrity on moving equipment.
  • Reduced installation and maintenance costs
  • Uses off-the-shelf batteries
  • Global use: Designed for global availability; variety of Limitless™ inputs with simple and universal PLC connections allows for use in most applications; simplifies design-in process, eliminates tooling costs and reduces manufacturing labor costs.


  • Grain elevators, grain diverters or flaps
  • Offshore drilling
  • Pipeline valves, pipeline pig monitoring
  • Petrochemical and waste treatment plants
  • Paint booths
  • Hazardous waste-handling facilities
  • Maintenance equipment
  • Agricultural equipment