This test kit is designed to measure the levels of free, total, and combined chlorine in water. It utilizes DPD (N,N-diethyl-p-phenylenediamine) tablets in conjunction with an Octa-Slide 2 Comparator for colorimetric analysis. The kit is capable of measuring chlorine concentrations within a range of 0.2 to 3.0 ppm (parts per million).