HEXVALENCE CHROMIUM ION PROCESS ANALYSIS SYSTEM

The utility model relates to a hexvalence chromium ion process analysis instrument composed of a sampling and detecting device and a processing and controlling device, which is suitable for the online automatic measurement of the concentration of the hexavalence chromium ion in the industrial discharged waste water. The instrument is characterized in that the design of the dimension and the shape of the optical length of a colorimetric ware is optimized; the operational method of double light path and double parameter ratio is adopted; the influence such as the voltage fluctuation of a light source, the contaminate of the colorimetric ware, the fatigue and the temperature of a photocell is eliminated; a monolithic computer is used; the instrument has the intellectualized function and the excellent cost performance; the complicated proportional pump is replaced by the monolithic computer and a controlling electromagnetic valve. Therefore, the utility model has the advantages of simple structure, strong anti-interference ability, high sensitivity and long term reliable and stable continuous operation.