The Ex Howl Call Telephone is a robust and durable sound-powered telephone system with highly efficient dynamic transmitter and receiver capsules offering communication without the need for a power supply. The FHF telephone is ideal for use in extreme environments, including areas with explosive atmospheres and fire-damp, such as mining, tunnelling, blast furnaces, offshore oil rigs and high-sea steamers. 

For further information about the FHF Ex Ferntel IP and FHF Weatherproof FernTel Ex Howl Call Telephone, please contact [email protected]

• Telephony without power supply
• Provides direct connection to switchboard, base, bridge or colleagues on the surface
• Ideal for use in areas with explosive atmospheres and fire-damp
• Call signal is generated by turning the rotary knob with an audio frequency dynamo
• Sturdy, impact-resistant and weatherproof housing
• 10km range 

• Dimensions - 370 x 180 x 95 mm
• Weight –
  • Hand telephone - 1.3 kg
  • Wall telephone - 2.3 kg
• Durability -  IP 54
• Wide range of accessories available