Guardian’s WTT-30-H Hazardous Area Outdoor Industrial Watertight analog telephone with metal keypad and curly handset cord has been designed to provide dependable service in hazardous areas.

In addition to being certified for use in Class I, Division 2 applications, it has both Type 4X & IP66 ratings which make it ideal for use in offshore or corrosive atmospheres.

All WTT-H and WTR-H models are housed in rugged thermoplastic resin enclosures and come with a spring loaded door.

Standards Compliance

CSA (”C” and “US”) 1545708

CSA (”C” and “US”)
Class I, Division 2, Groups A, B, C and D;
CLASS 4838 81 – TELECOMMUNICATION EQUIPMENT – For Hazardous Locations – Certified to US Standards
CLASS 4838 01 – TELECOMMUNICATION EQUIPMENT – For Hazardous Locations
CSA (”C” and “US”) Certificate 1545708 (LR 6557)


Grant of FCC Equipment Certification
Certification Under CFR 47 Part 68 – Connection of Terminal Equipment to the telephone network
Subject to the provisions of Part 68 of the FCC Rules and Regulations. Certification is Hereby Granted for the equipment listed herein. Any change in model number or trade name requires amendment of certification. Each piece of equipment bearing the listed trade name(s) and model number(s) shall be labeled in accordance with the provisions of Section TSB168.
FCC TCB Certificate HQHCAN-22517-TE-E

Product Features

  • Water/Dust-tight thermoplastic resin enclosure, Type 4X & IP66
  • Metal keypad for extended life
  • Curly handset cord
  • Heavy duty G Type industrial handset
  • Handset retainers to maintain on-hook status
  • Encapsulated circuitry impervious to water and particles
  • Waterproof connections & stainless steel fittings for longer life
  • Corrosion protected and powder coated steel faceplate
  • Magnetic reed hook switch to reduce parts subject to wear
  • Surge arrestor to prevent voltage spike damage
  • Electret noise reducing microphone for clear communication
  • Temperature range -40˚ to +140˚F (-40˚ to +60˚C)
  • Modular parts for easy service
  • Integrated mounting feet
  • Hearing aid compatible & receiver volume adjustment
  • Electronic ringer for reliability
  • Tone or pulse dialing for universal configuration
  • Easily connects to any single line analog CO or PBX telephone line
  • Spring loaded door
  • Easy support drill guides for top & bottom mount glands
  • Order number: P5304
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