Colorimeter Chlorine 0 to 4.0 ppm Range Accuracy +/-2 Percent Full Scale Resolution 0.01 ppm Free Chlorine 0 to 4.0 PPM Total Chlorine 0 to 4 PPM Chlorine Resolution 0.01 PPM Chlorine Accuracy +/-2 Percent of Full Scale Includes DPD Tablet Reagents for 100 Tests (6) Sample Vials Carrying Case