Theprocessphotometertestomat2000 Feisawet-chemicalonlinemonitorformonitoringthecontentofdissolvediron(II)+(III)inthe0to1.0mg/l(ppm)rangeusingthecolourimetricmethod.Dosingof2reagentsanddisplayoftheanalysisvalueafterareactiontimeofapprox.7minutes(absolutemeasuringtimewithoutflushingtimes)