TYPE 8103

Miniature Hydrophone 

Miniature Hydrophone Type 8103 is a small piezoelectric transducer designed for high-frequency laboratory and industrial use. The instrument is particularly useful in the acoustic study of marine animals or for cavitation measurement.

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Miniature Hydrophone Type 8103 is designed for high-frequency laboratory and industrial use and is supplied with an integral 6m cable terminated 10-32 unf microdot plug.


  • Calibration reference standards 
  • Ultrasonic measurements in liquids 
  • Cavitation measurements 
  • Laboratory/industrial measurements in liquids and gases 
  • As underwater projectors (8103, 8104, and 8105
  • Noise measurements in humid and polluted atmospheres
Miniature hydrophone Type 8103 is a small, high-sensitivity hydrophone for absolute sound measurements over the frequency range 0.1Hz to 180 kHz, with a receiving sensitivity of −211 dB re 1V/μPa. The high sensitivity and good all-round characteristics, make it ideal for laboratory, industrial, and educational use.

The high-frequency response of this hydrophone becomes especially valuable when making acoustic investigations of marine animals, and for measuring pressure-distribution patterns in ultrasonic-cleaning baths. 
Voltage sensitivity with cable at 20°
30 uV/Pa ± 8 uV
Charge sensitivity
Capacitance with integral cable
Frequency range re. 250 Hz
0.1Hz to 20 kHz (+1/–1.5 dB) / 0.1Hz to 180 kHz (+3.5/−12.5 dB)
Operating temperature range short-tem continuous
-30 to +80
Max operating static pressure
252 dB = 4 × 10^6 Pa
50 mm (1.97 inch)
Weight including integral cable
170 g (0.37 lb)
Integral cable
6 m waterproof low-noise double-shielded teflon cable with standard miniature coaxial plug