RBRbrevio³ C.T.D logger
Product Number：RBRbrevio³ C.T.D logger
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 communication option
C.T.D conductivity, temperature, pressure (depth) sensors
240M readings
Short housing for vehicle integration
Up to 32Hz sampling
USB-C download
Realtime communications
Twist activation
Wi-Fi communication option
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%.
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%.
| Physical Storage 240M readings Internal power 4 AA cells External power 4.5-30V Communication RS-232 Clock drift ±60 seconds/year Depth rating Plastic: 750m / Ti: 6,000m Housing Plastic or titanium Size >326mm x 63.3mm (plastic) / >317mm x 60.3mm (titanium) Weight (without batteries) ~1.00kg in air (plastic) ~1.75kg in air (titanium) ~0.20kg in water (plastic) ~1.00kg in water (titanium) Sampling speed 2Hz to 24h |fast8 4, 8Hz |fast16 4, 8, 16Hz |fast32 4, 8, 16, 24, 32Hz |
| Conductivity (up to 6,000m) Range 0-85mS/cm Initial accuracy ±0.003mS/cm Typical stability 0.010mS/cm/year Resolution 0.001mS/cm |
| Temperature Range -5°C to 35°C Initial accuracy ±0.002°C Resolution <0.00005°C Time constant ~1s (standard) or ~0.1s (optional) Typical stability 0.002°C/year |
| Pressure (Depth) Range 20 / 50 / 100 / 200 / 500 / 750 / 1000 / 2000 / 4000 / 6000 (dbar) Initial accuracy ±0.05% full scale Resolution 0.001% full scale Time constant <0.01s Typical stability 0.05% FS |
