RBRDuo TDO Temperature and Dissolved Oxygen Logger
The RBRDuo TDO is submersible logger (sonde, recorder) that is self-contained, accurate and autonomous; it can be deployed for a period of up to 5 years at 1 minute sampling intervals and data can be retained in memory for 20 years (even without batteries).
The RBRDuo TDO has a depth rating of 740m. The temperature channel calibrated an accuracy of ± 0.002°C (ITS-90). Typical drift has been measured to be 0.002°C/year. The thermistor may be a standard response (<3s time constant) or a fast response probe (0.095s time constant). The dissolved oxygen channel is calibrated to an accuracy of 2% oxygen saturation, range 0-600%. Calibration constants are stored in the logger and recalibration is easily carried out by the end-user.