The Waterproof Chlorine Meter takes a direct readings of total chlorine for fast and easy measurements. Use dissolved in-solution reagent tablets (Item #2016) for direct measurements. Measurements are unaffected by sample color or turbidity. The meter has automatic electronic calibration. The internal memory stores, tags and recalls up to 15 readings. The LCD display simultaneously displays ppm of total chlorine and temperature plus analog bar graph indicator. Includes meter, flat surface chlorine electrode, reagent tables (50 tests), protective sensor cap, sample cup with cap, 4 3V CR-2032 batteries and a 48" (1.2m) neck strap.