LA-PH dyeing machine pH value control system is specially designed for the acid control of dyeing nylon (nylon), and is suitable for various dyeing machines. Instant monitoring of pH for most dyeing machines. It includes the interface for extracting the dye liquor from the dyeing machine, the internal cooling mechanism, the sensor for measuring pH value and temperature, the quantitative acid pump, the dye liquor return outlet, the circulation pump equipment, the LA-828G/GL controller and other hardware composed of.