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FAMILY 8106

LOW-NOISE HYDROPHONE WITH PREAMPLIFIER

Hydrophone Type 8106 features a built-in, thick-film, and low noise, 10 dB preamplifier, delivering signal conditioning for transmission over very long distances. This makes Hydrophone Type 8106 suitable for underwater sound measurements down to 1000 meters depth. 

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FAMILY 8106

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Type 8106 is a wide-range, piezoelectric hydrophone with preamplifier for making absolute sound measurements over the frequency range 7Hz to 80 kHz, featuring an impressive receiving sensitivity of −173dB re 1V/μPa.

  • Calibration reference standards 
  • Ultrasonic measurements in liquids 
  • Cavitation measurements 
  • Laboratory and industrial measurements in liquids and gases 
  • As underwater projectors (8103, 8104 and 8105)
  • Noise measurements in humid and polluted atmospheres
FAMILY 8106
Sensitivity 2.24 mV/Pa
Lower frequency 3 Hz
Higher frequency 80 kHz
Maximum operating static pressure 267 dB (9.8 × 10^6 Pa)
Mounting space - length 182 mm
Mounting space - length 7.17 in
Mounting space - width 32 mm
Mounting space - width 1.26 in
Mounting space - height 182 mm
Mounting space - height 7.17 in

The preamplifier provides a 7Hz high-pass filter and an insert-voltage calibration facility, but does not allow the hydrophone to be used as a projector. 


The hydrophone is built to withstanding high static pressure, the operational upper limit being 107 Pa (100 atm / 1000 m (3250 ft.) ocean depth. 

An integrated watertight connector allows quick disconnection of the cable and makes replacement and storage very easy.