The getOtwo optical oxygen sensor (DO) from getAMO enables oxygen measurements in liquid media. It detects oxygen fluorescence and can be used for measurement in slurries for monitoring oxidation processes, for fermentation monitoring and for water analysis. Usual standard electrodes can be replaced because its shaft has an outer diameter of 12 mm. It can measure from 0 to 20 mg/l with a resolution of 0.01 to 0.1 mg/l. The limit of detection is .01 mg/l. It takes <1 min to start up.