Extech CL200 Chlorine Tester - Resolution (Chlorine Testers): 0.01ppm; 0.1F/C

0.01 ppm Resolution,-5 to 90 C Temperature Range,1.4 inch D x 6.8 inch H x 1.6 inch W,Measuring range from 0.01 to 10ppm,Automatic self calibration,Unaffected by sample color or turbidity,EPA approved,Uses simple to use reagent tablets rather than messy powders