Abstract: Base on photometric titration, BGRIMM Technology Group designs the BOTA-PH Slurry pH Titrimeter. The article introduces mainly the operating principle, compositionSandSstructure, characteristics, industrial application effect and so on for the meter. After more than 2 months of continuous industrial experiments, the meter is proved that it owns some characteristics, such as the high measurement accuracy, low maintenance, meanwhile, can realize the closed loop interlocking control. The meter has solved the difficult problem of pH measurement of slurry and brought considerable economic benefits to the concentratingSmillS , which has been well received by the owners.