The TGR-1050 is a single channel (pressure) logger that measures tides or depth.
The TGR-2050 is a dual channel (temperature and pressure) logger that is a tide recorder.
The TWR-2050 is a dual channel (temperature and pressure) logger that is a tide and wave recorder. In addition to the capabilities of the TGR the TWR measures waves and collects data that can be processed by the RBR software for wave analysis.
