Microprocessor controlled photometer for the measurement of free and total chlorine hi 96711 measures the content of free and total chlorine in a water sample from 0 to 5 mgl the method of investigation is based on the usepa method 3305 and standard method 4500 cl g it has a powerful visual system consisting of a tungsten lamp and a narrow band interference filter for exact and reproducible measurement results as well as minimum maintenance a wide basin made from special glass for simple m