ExStik Waterproof Chlorine Meter. Direct reading of Total Chlorine down to 0.01ppm and is unaffected by color/turbidity of the sample. Direct reading of Total Chlorine provides fast and easy measurements (less than 2 minutes). Low detection limit down to 0.01ppm. Wide dynamic range of measurement up to 10ppm (use dilution method for 10 to 50ppm). Unaffected by sample color or turbidity. Automatic electronic calibration. Memory stores, tags and recalls up to 15 readings. Unique flat surface chlorine electrode. Waterproof to IP67 standard. The state of the art LCD simultaneously displays ppm of Total Chlorine and Temperature plus analog bargraph indicator. Complete with meter and flat surface Chlorine electrode, ExTab reagent tablets (50 tests), protective sensor cap, sample cup with cap, four 3V CR-2032 batteries, and 48 in. (1.2m) neck strap.