Zinc is widely used in alloys (brass, bronze, and dye-casting alloys), in galvanizing iron and other metals, also as a fungicide. It is also an essential growth element in human diet. But with concentrations higher than 5 mg/L, it gives a bitter taste to water and opalescence to alkaline water. Zinc can enter the domestic water supply from the deterioration of galvanized iron and dezincification of brass. In addition to drinking water, zinc is measured in surface finishing, boilers and cooling towers, water conditioning, and effluent waters.

Hanna offers a photometric method for measuring zinc. The method is an adaptation of the Standard Methods for the Examination of Water and Wastewater, 23rd Edition, zinc method. When the reagent is added to a sample containing zinc, the sample will turn a brown-green to a blue hue; the greater the concentration, the deeper the color. The associated color change is then colorimetrically analyzed according to the Beer-Lambert Law.


Accessories include the replacement cuvettes and caps for the photometers.

Benchtop Photometers

Benchtop photometers include multiparameter versions for environmental, water treatment, water conditioning, and wastewater treatment. Each photometer is customized to have the parameters used by a specific industry. All benchtop have a digital pH electrode input allowing it to be used as a traditional pH meter.


In this category are the reagents for the portable photometer, benchtop photometers, and the spectrophtometer.