Hach Water Quality Test Strips provide fast and portable quality control of drinking water, wastewater, industrial process water and other liquids. Test Strips are used in the laboratory and field for the instant sample evaluation. In order to conduct analysis of the collected sample, it is required to put the strip in the sample and compare the colour to the scale printed on the bottle. Analyze water quality control without measuring, adjustment, cleaning, or chemical treatment. Ready-to-use Test Strips determine nitrate, nitrite, chloride, ammonia, alkalinity, hardness, pH, iron, copper, free and total chlorine concentration in a matter of minutes. Each package contains 25, 40, 50, 100 or 250 strips depending on the parameter.