Hyperbaric lifeboat comms

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JFD's Divex branded hyperbaric lifeboat (HLB) communications box allows clear communications between the lifeboat's occupants and an external helium speech unscrambler.


HLB communications box

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  • Call switch
  • Volume control
  • Headset select switch
  • Press to talk switch
  • Headphone socket
  • Robust, stainless steel enclosure (316 grade)
  • Mounting lugs for easy installation
  • Internal PCB mounted on an easily removed plate to improve installation
  • Single PCB terminal accepts all incoming wiring making cable termination to the comms box very easy
  • Low profile components
  • Flush mount chrome call switch
  • Volume control when using headset
  • Built in panel microphone
  • Electret mic insert
  • Frequency response: 50Hz to 13kHz
  • Sensitivity: 60dB ±3dB
  • Impedance: 1kΩ
  • Flush mount PTT switch
  • Standard headset jacks allowing for a wider range of headsets to be used
  • Flush mount headset select switch for selecting either panel microphone/speaker or headset


Item Order Code
Hyperbaric lifeboat (HLB) comms box





Document Document Type Download


HLB communications box Datasheet

CO-MDS-493 R1


HLB communications box Drawing

CO436S1 R1