These are individual phones with long leads connecting to Mueller-type cables. They are intended to be used in situations where a stream crossing allows the cable to be suspended above the water and the phones can easily be attached and dropped on the bottom to eliminate gaps in the record. Hydrophones(6) blue)9Hz (2) with piezoelectric crystals. Hydrophone diameter is 1.57" (4cm). Length 8".
1.5 x 8 inches
lbs.

     

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