本文叙述了以双极化电极恒流电位滴定法为基础而没计的全自动电位滴定仪。线路上采用脉冲转换、步进电机加液系统,并有自动调零、补缺、停止等装置、数码读数,操作方便可靠。水中溶解氧的滴定终点灵敏度为400mv/0.05ml,测定偏差为±0.03ml-O_2 l/l。本仪器还可作pH,沉淀法电位滴定及实验室自动控制加液用。 This paper describes a fully automatic potentiometric titrator based on the bipolarized constant current potentiometric titration. The line uses pulse conversion, stepping motor plus liquid system, and automatic zero, fill vacancies, stop devices, digital readings, easy and reliable operation. Dissolved oxygen in water titration endpoint sensitivity of 400mv / 0.05ml, determination of deviation of ± 0.03ml-O_2 l / l. The instrument can also be used for pH, precipitation potentiometric titration and laboratory automatic control plus fluid.