The Hadex® Checkit is a compact, handy colorimetric unit which is suitable to measure the amount of available Hadex in your potable water manually. Hadex is a food grade drinking water disinfectant. Supplied with a generous number of different colour scales, the kit provides the basis for a comprehensive, easy-to-use colorimetric analysis system. - Testing range of 0 – 2 mg/ltr - Easy operation and exact reagent dosing - High accuracy - Tablet reagents with a minimum guaranteed shelf life of 5/10 years - Unrestricted shipment - Contains 30 tests