The SD oxygen sensor type Oxi 300 is suitable for the galvanic determination of dissolved oxygen up to 70 mg/l. The sensor is extremely pressure resistant (max. 3 bar), so that water depths of up to 30 m can be reached without any problems. The membrane at the sensor tip is specifically adapted to the permeability of O2 and can be easily replaced if necessary. An an NTC 10 kΩ thermistor enables the precise determination of dissolved oxygen independent of its temperature-dependent solubility behavior.