RS Aqua – Orca

RS Aqua's intelligent family of high specification, multi-channel passive acoustic recorders & signal processors

Group of Orca acoustic recorders in Port Solent

Orca Downloads


Key System Features:

  • Flexible sampling rates from 24 KHz to 384 kHz over 5 channels
  • Real-time data streaming via ethernet
  • Up to 4 TB SD & SSD storage
  • Configurable hydrophone options
  • Noise calculations performed in-situ
  • Internal battery and optional external battery packs
  • Low power consumption for long deployments

Orca is a high specification underwater acoustic data recorder and signal processor. Supporting multiple input channels and extremely high sampling rates, Orca can be used to capture, record and process the richest underwater data sets possible in real-time.

Orca is straight forward easy to configure, deploy and use, and flexible enough for almost any underwater acoustic measurement scenario. Current applications for these instruments include underwater noise characterisation, marine mammal studies, underwater noise detection and localisations.

Data can be recorded and processed autonomously or streamed in real time via Ethernet, or wirelessly with the TR-Float unit.

Real time configuration, analysis and visualisation software called TRAC is supplied with every Orca. It allows users to easily setup their instrument parameters including enabled channels, sampling rates, channel gain, recording schedules and internal processing. Orca also offers the capability to support an open application interface for customised signal detection – please contact us for further discussion.

The Orca product family is available in several different form factors, both supporting 5 synchronously sampled hydrophone inputs, with configurable sampling rates up to 384 kHz on all 5 channels. Whilst deployed the Orca can autonomously process noise data to standards required by the EU Marine Strategy Framework Directive. Processed and raw data can either be streamed via Ethernet or WiFi, or stored on up to 4 TB of internal solid state memory.

RS Aqua are also able to provide ClearSignal® anti-fouling coating for Orca as an in-house service to reduce the impact of biofouling on your instrument.

Power Internal Power: Alkaline or Lithium Rechargeable Options
External Power: 7-30V DC
Average Power Consumption: 300 mW – 3W (depending on use)
Analogue Input Channels                Number of Channels: 5 – Standard (more available on request)
ADC Number of Bits: 16 – Standard (24 bit version available on request)
Dynamic Range Per Channel: 95.5 dB

(full bandwidth, better at lower sampling rates)

Sampling Rates Supported:

24 KHz, 48 KHz, 96 KHz, 192 KHz, 384 KHz

Memory Integrated 256 GB SD Card and 500 GB SSD Standard

Up to 4 TB available on request

Configurable recording, schedule and duty cycling
Communications Ethernet
High Speed USB for Download
Included Processing 1/3 Octave Noise Analysis

Average SPL, Max Peak to Peak, Percentiles

Real Time Spectrograms

Environmental 200 m depth standard (deeper 750/3000 m options available on request)
Operating Temperature: -10° C to 50° C


Jon Bull, University of Southampton at NOCS: The ORCAs we have deployed have primarily facilitated Carbon Capture & Storage (CCS) monitoring. By detecting fluid & air bubble movement, they can give legal reassurance for CCS reservoirs. They have also been utilised for observing marine soundscapes & marine mammal acoustics research, which has provided data for various PhD projects at the University of Southampton.

The data output from the instruments has been of good quality, while the battery life over short term deployments has been sufficient. Using the TRAC software, to configure and programme the instruments, has been straightforward, effective and equivalent to ORCA’s competitors.

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