The VH165 and VH180 are omni-directional hydrophones for use with the VR100 acoustic receiver for active tracking of VEMCO acoustic transmitters on passing fish or equipment.
The VH165 operates between 50 kHz to 85 kHz and the VH180 operates at the 180 kHz. The VH165 is encased in a black 16 mm diameter epoxy tube at a length of 100 mm and the VH180 is encased in a green 16 mm diameter epoxy tube at a length of 100 mm.
- Attach hydrophone to a weighted rope to counteract buoyancy and put hydrophone to depth. Do not put strain on hydrophone cable! Amount of weight needed depends on flow rate in the area.
- Turn off boat motor and depth sounder to reduce acoustic interface.
For more details, see Downloads section.
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Specifications: Frequency range VH165: 50kHz – 85kHz
Tag compatibility VH165: V7, V8, V9, V13, V16
VH180: V4, V5, V6
Receiver compatibility VR100 Operational temperature range -5°C to +40°C (water must not freeze) Case (dimensions and material) VH165: 16 mm diameter x 100 mm black epoxy tube
VH180: 16 mm diameter x 100 mm green epoxy tube
Weight in air 550 g Cable type and available lengths Shielded twisted pair, polyurethane jacket; Lengths: 5 m, 10 m (standard), 30 m Uses Omni-directional hydrophone “hears” pings from any direction. Best for determining if a tag is in the area. Maximum tow speed Not recommended Preamplifier gain 50 dB nominal
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