geophone dan hidrofon

Underwater Hydrophone HJ-8B-8 type piezoelectric geophone Hydrophone Product features: 1 High sensitivity output; 2 Working depth range of 100 meters; 3 High reliability, long service life; 4 Special shell protection; Fast detailed description: HJ-8 type piezoelectric detector is mainly used for marine geological exploration. With the receiving frequency band range of housing design, unique wide and high sensitivity. The maximum depth is 100 meters. Mainly used in marine