Digital smart sensor stores calibration data — change sensors without recalibrating The ProDSS sensor housing accepts four user-replaceable sensors at a time and the universal connector system allows any sensor to connect with any housing port. Meter Type Accessory, Probes and Sensors Min Dissolved Oxygen 0 to 500%, 0 to 50 ppm Dissolved Oxygen Resolution 0.1 or 0.01 ppm, 0.1 or 1% saturation Dissolved Oxygen Accuracy±1% of rdg or 1% saturation, whichever is greater (up to 200%), ±8% of rdg (above 200%), ±0.1 ppm or 1% of rdg, whichever is greater (up to 20 ppm), ±8% of rdg (above 20 ppm) Data Logging (points) Calibration data