RBRduo³ C.T | uv and RBRconcerto³ C.T.D | uv

This guide focuses on CT and CTD instruments with active antifouling.
For information on other sensors and instruments, refer to the RBR Instrument Guide: Standard Instruments³.

RBR offers two standard instruments with active antifouling:

  • RBRduo³ C.T | uv - conductivity and temperature

  • RBRconcerto³ C.T.D | uv - conductivity, temperature, and pressure

The RBRduo³ C.T | uv and RBRconcerto³ C.T.D | uv use UV LEDs (ultraviolet light emitting diodes) and should be handled with care.
Wear approved safety glasses with side protection and UV filter lenses.
Avoid looking at the LEDs. See Safety precautions.
rbrconcerto ctduv 5
Fig. 1.    RBRconcerto³ C.T.D | uv

The RBRduo³ C.T | uv and RBRconcerto³ C.T.D | uv offer the same features as their CT and CTD counterparts, plus active antifouling. They are uniquely designed to determine salinity by measuring the conductivity and temperature of water. Their rugged inductive cell is not affected by surface contaminants or freezing conditions.

Equipped with a piezoresistive pressure channel, the RBRconcerto³ C.T.D | uv provides more accurate salinity data when the instrument is sampling at varying depths.

The active antifouling system helps maintain high accuracy of measurements during extended deployments in the photic zone. It uses an array of active UV LEDs to illuminate critical sensor surfaces and reduce biofouling on the conductivity cell. The RBRduo³ C.T | uv and RBRconcerto³ C.T.D | uv are perfect for moored applications, such as on surface buoys, seafloor observatories, and cabled realtime monitoring systems, and are recommended for operation depths less than 200m.
ctd uv sec with cone 3
Fig. 2.    Four UV LEDs illuminating the CT cell

All RBR standard instruments support the following features :

  • High accuracy

  • Extended deployments

  • Large memory

  • Flexible schedules

  • Twist activation

  • USB-C download

  • Realtime communication

  • Wi-Fi

The RBRduo³ C.T | uv and RBRconcerto³ C.T.D | uv instruments are equipped with connectorized end-caps designed to connect to external battery canisters or cabled power. Backup internal batteries ensure uninterrupted sampling through sporadic power disruptions. Stream your realtime data through RS-232/485, or download a complete dataset at the end of your deployment using USB-C. A dedicated holder makes it simple to replace desiccant before each deployment. The calibration coefficients are stored on the instrument, and only one software tool, Ruskin, is required to operate it. Datasets can be read directly in Matlab, or exported to Excel, OceanDataView®, or text files. The instruments come with a Wi-Fi module and twist activation.

For a detailed description of using the Ruskin software, see Ruskin User Guide: Standard Instruments³.