Q45H/64 model is a Multi-fuction monitoring system, it can be used for monitoring of testing ozone in water continuously. 1,Q45H/64 model is a Multi-fuction monitoring system, it can be used for monitoring of dissolved ozone in water continuously.the user can choose  system range:0-200.0ppb,0-2.000ppm or 0-20.00ppm, it's suitable temperature range is 0-55. 2,photos of factory

online automatic ozone test system