The TWR-2050 is a self-contained, submersible logger, designed to measure tide and wave data. In addition to averaging capability for tide measurement, the TWR-2050 is capable of measuring bursts of pressure data for wave analysis. The RBR Tide/Wave recorder is very accurate and small (265mm x 38mm OD), and can be mounted on the sea or harbour floor, fastened to an existing structure, or attached to a mooring line.

Averaging time is user-selectable from 10 seconds to 9 hours. Burst rates can be 1, 2, or 4Hz. Wave sampling is achieved by taking 512, 1024, or 2048 samples at the selected burst rate. The TWR-2050 can be configured to trigger burst data collection at fixed times.

The temperature channel of the TWR-2050 is calibrated to an accuracy of ±0.002°C (ITS-90), with typical annual drift of better than 0.002°C/year. The depth channel is calibrated to an accuracy of 0.05%fs. Calibration constants are stored in the logger and recalibration is possible by the end-user.

The RBR Windows software package has a straight-forward logger set up display menu, which includes synchronizing the logger to the PC clock, setting the sampling period, setting the averaging burst length, and start and stop logging date selection by means of a graphical calendar. Data can also be saved to a .mat file for import into Matlab® for further analysis and display.

• Sample rate

• Tide burst duration

• Tide cycle time

• Wave burst duration

• Wave cycle time

• Spectral resolution

• Mean level

• Tidal slope

• Significant wave height (Hs)

• Min and max elevation from mean

• Mean period

• Mean zero crossing period

• Peak period

• Significant wave period

• Total energy