Photoelectric counting alkalinity automatic measuring apparatus

The invention belongs to the technical field of chemical analysis and testing, and relates to a photoelectric counting alkalinity automatic measuring apparatus which is characterized in that: a water sample inlet pipe, a pH electrode, and a siphon positioning pipe are arranged in a measuring glass; a water sample inlet controlling solenoid valve is fixed on the water sample inlet pipe; a second photoelectric detection counter is sleeved on an out-stretching end of the siphon positioning pipe; an acid liquor glass is positioned above the measuring glass with a preset height; an acid liquor outlet of the acid liquor glass is sequentially connected to a silica rubber vessel and a burette; a titrating solenoid valve is fixed between the acid liquor outlet of the acid liquor glass and the burette; a first photoelectric detection counter is sleeved in the burette; a waste discharging solenoid valve is fixed on the bottom of the measuring glass through a pipeline; a magnetic stirring apparatus is arranged on the inn