The Extech CL200 is an ExStik chlorine meter. This revolutionary technology measures the direct total chlorine content from 0.01 ppm to 10 ppm. It performs non-subjective measurements that are not affected by interferences that occur with conventional colorimeters and spectrophotometers, such as color, turbidity, light and sample contamination. The scope of delivery includes an electrode, five packs of 10 reagent tablets (50 tests), a sensor protection cap, a sample cup with lid, four CR2032 batteries and a 1.2 m (48") carrying strap.