The Hobby pH electrode is a high quality plastic pH electrode with BNC connector for universal use. The HOBBY pH Electrode was developed for continuous measurement of the ph value in the aquarium.Hobby pH Electrode+ high quality plastic pH electrode+ suitable for practically all commercially available pH measuring and control devices thanks to a BNC connection+ not refillable+ suitable for fresh and marine watertechnical Data Hobby pH Electrodeoverall length without cable: 150 mmElectrolyte: KCL 3-mol, liquidMeasuring range: pH 0 - pH 14E: pH 7Connection of the electrode: fixed cable 1.5 m, BNC plugTemperature range: 0C, + 80C