RBRbrevio³

The RBRbrevio³ C.T.D is short in stature but tall on performance. With world-class sensor accuracy, a sampling rate up to 32Hz, and realtime data output, the RBRbrevio³ is the smallest CTD to integrate into your towed vehicle, AUV, ASV, or ROV.

  • 240M readings
  • Short housing for vehicle integration
  • Up to 32Hz sampling
  • USB-C download
  • Realtime communications
  • Twist activation
  • Wi-Fi ready
C.T.D conductivity, temperature, pressure (depth) sensors
RBRbrevio³ C.T.D

Optimized for vehicle integration applications, the RBRbrevio³ offers a short housing and right-angle or in-line connector to fit your needs. The CTD is used to derive salinity, density anomaly, and sound velocity. When mounted on a stationary subsea vehicle, the pressure sensor may be used to measure high-frequency waves. The RBRbrevio³ measures conductivity using a rugged inductive cell that is not affected by surface contaminants or freezing conditions. The CFD-optimised, low aspect ratio conductivity cell is self-flushing and does not require a pump. Totally silent operation is optimized for stealth missions and passive acoustic listening. Data accuracy is improved and salinity spikes are reduced with the co-located fast-response thermistor.

About the sensors

Conductivity is measured with an inductive sensor, suitable for deployment in marine, estuarine, or fresh water. There are no exposed contacts, which avoids susceptibility to corrosion, and the housing may be frozen into ice without damage. It is characterized for the mechanical effects of both temperature and pressure to allow for accurate correction in salinity derivation. These coefficients are provided for customers who prefer to calculate their own corrections. In addition, it is suitable for use outside the usual realms of PSS-78 practical salinity scale, in applications such as desalination brine monitoring. The conductivity readings are temperature-corrected.

The temperature sensor is built and calibrated in-house using an aged thermistor. The temperature channel is calibrated an accuracy of ± 0.002°C (ITS-90) over the range -5 to +35°C. Extended range calibrations are available.

Pressure is measured with a piezo-resistive transducer with nickel based super alloy diaphragm to avoid corrosion. Accuracy is 0.05% of the full scale rating and achievable resolution is 0.001%.