VHTx : Transponding Hydrophone (69 kHz)

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  • Overview
  • Gallery
  • Specifications
  • Downloads
  • Overview

    The VHTx is an omni-directional transponding hydrophone that attaches to the VR100 active tracking receiver to communicate with VEMCO’s two newest receivers, the VR2Tx Transceiver and the VR2AR Acoustic Release and Transceiver.

    The VHTx maintains all of the features of the VH165 hydrophone and is used with the VR100 receiver to locate and track VEMCO acoustic transmitters on passing fish or equipment. The VHTx operates within the 50 kHz to 85 kHz frequency range. The hydrophone is protected by a cage and is weighted to aid in lowering the hydrophone into water.


    • The VHTx is weighted and, depending on the current in the area, should not need additional weight to keep it at depth.  If additional weight is required, be sure to use a separate rope to hold the weight and use strain-relief techniques to keep the hydrophone cable from being strained.
    • Turn off boat motor and depth sounder to reduce acoustic interference.


    For more details, see Downloads section.

    Have you looked whether you need to update your VR100? click here

  • Gallery
  • Specifications
    Frequency range 50kHz – 85kHz
    Tag compatibility V7, V8, V9, V13, V16, VMT
    Receiver compatibility VR100-200
    Operational temperature range -5°C to +40°C (water must not freeze)
    Case (dimensions and material) 41.275 mm diameter x 210 mm; Black acetal with a 304 stainless steel cage
    Weight in air 2434 g (incuding cable)
    Cable type and available lengths Shielded twisted, polyurethane jacket cable with a minimum bend radius of 4 inches; Length 25 metres standard
    Uses Omni-directional hydrophone detects pings from any direction and transmits in all directions. Use with VR100-200 for acoustic communication with transponding receivers (VR2Tx and VR2AR).
    Maximum tow speed Not recommended
    Preamplifier gain 50 dB nominal
  • Downloads

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