Single Channel Underwater Acoustic Monitoring
Compact & intelligent underwater acoustics in a low power and low cost package


The standard PORPOISE acoustic recording system is built from composite glass fibre and engineered plastic rated to 500m depth. This version of PORPOISE includes an integrated hydrophone and low noise programmable gain pre-amplifier for excellent 24 bit acoustic data quality over a huge dynamic range. Each unit includes 512 GB of internal recording memory, and is user expandable with SD cards to 4 TB. In addition to world class performance, PORPOISE comes at an affordable price for any research project.






500m | 2000m | 6000m


PORPOISE-EXT includes the same electronics and features as the standard version, but includes an option for an external hydrophone. This unit is housed in a pressure vessel that is depth rated in excess of 6000m.

PORPOISE-EXT allows users to use one of many hydrophones on the market that might suit a particular application. By decoupling the hydrophone element from the pressure vessel, users can choose the right sensor for a broader range of depth or export constraints.



PORPOISE-84D has all the same features as a Porpoise-EXT except for the internal battery pack. This version was designed to go the distance. The internal 84 D-cell battery pack allows the user to go the distance with longer deployments. The best of all, it’s all in one package. Each unit includes 1TB of internal recording memory, and is user expandable with microSD cards to 8TB.



OEM Porpoise

Porpoise is also available as an OEM product.  The OEM has the same features as the original Porpoise but without the housing. The OEM Porpoise is designed for use in a wide range of applications. They are most commonly integrated into or used in AUVs, gliders, ROVs, Manned subs and diving applications. Contact us for more information on the OEM Porpoise.


  • Internal Power: 12 x AAA Cells (user replaceable)
  • External Power: 6.5V - 26V DC, External Packs Available
  • Analogue Bandwidth > 150 kHz
  • ADC: 24 Bits Sigma Delta
  • Dynamic Range: 110 dB (full bandwidth)
  • Configurable Gain: 10 dB- 40 dB
  • Maximum Sensitivity: -165 dB Re 1 V/µPa to 205 dB Re re 1 V/µPa With Gain Control
  • Sampling Rates Supported: 2khz, 6khz, 8khz, 16khz, 24khz, 32khz, 48khz, 64khz, 96khz,128khz, 192khz, 256khz, 384khz
  • Programmable High Pass Filter: Software Controlled
  • Up to 4 TB, Internal Removable SD Card Storage or 8 TB with Micro SD
  • Configurable recording, schedule and duty cycling
  • PORPOISE: 70mm x 233mm, 2.5lbs
  • PORPOISE-EXT (2000m): 70mm x 233mm, 4.8lbs
  • Real Time Ethernet Streaming - spectrograms, live audio, configuration and data download
  • PORPOISE: 500m standard (deeper on request)
  • PORPOISE-EXT: 2000m pressure vessel, pressure relief valve included.
  • NOTE: External Hydrophone version limited to 900m depth. External hydrophone connection via 8 pin female subconnector.
External Integration
  • GPS Input for PPS Time Synchronization
  • Real Time Buoy