... 01 PH 3.Working voltage: 220VAC 10%, 50/60HZ ApplicationWidely used in environmental protection, sewage treatment, thermal power, breeding, food ... chemical industry, water and other solution PH value of the online detection,swimming pool.Main technical parameters:1.Measuring range: - ... hole size: 92x92mm17.Weight: 0.9 Kg High accuracy online PH controller/PH probe/water treatment PH analyzer with signal ...