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GeoSpectrum designs and manufactures the hydrophones listed on this website and continues to design new hydrophones to meet customers requirements. Our starting point for all designs is a finite element model that predicts performance, but the design is only considered complete after it has been subjected to a full range of environmental extremes and operating conditions. Many hydrophones are “aged” in the factory prior to calibration to ensure that the calibration numbers are accurate years later.

The designs range from streamer hydrophones, whose basic design makes them suitable for high-volume production at low cost, to 2- and 3-dimensional particle velocity sensors for mammal detection, air-gun characterization, and down-hole well monitoring.

The groupings below provide some guidance as to what hydrophone to use in which situation, but we are pleased to assist you in which hydrophone to use for your application.

View the Hydrophone Summary Sheet here

Streamer Phones

  • M1
  • M2/M2E/M2C NEW!
  • M4
  • M5
  • M8C*
  • M9
  • M14A

>3 km Deep

  • M7
  • M14A
  • M24
High frequency omni-directional

High sensitivity


  • M24


Depth Switched

  • M2E


* This product has been discontinued; please contact GeoSpectrum Technologies for a suitable alternative for your requirement.

GeoSpectrum Technologies supplies a wide range of transducer components suitable as replacements to your OEM hydrophone equipment. Visit the Replacement Transducer Components page to find out more.


Please contact us for further details on any of these products or to discuss your specific needs.