The Hach DR300 Pocket Colorimeter sets a high standard for chlorine testing with its precision, portability, and simplicity. Designed specifically for Free and Total Chlorine measurements, it delivers reliable results in a mid-range capacity that suits diverse water quality applications, including groundwater, surface water, and municipal water testing. Built for Tough Conditions Engineered with an IP67 waterproof rating, the DR300 withstands challenging environments, including rain, dirt, and temperature extremes. Its rugged design makes it an excellent companion for fieldwork while ensuring lasting durability. Accurate, Easy-to-Use Solution Offering a measurement range of 0.05–4.00 mg/L for Free Chlorine and 0.1–10.0 mg/L for Total Chlorine, the DR300 provides laboratory-grade accuracy. Its intuitive interface minimizes user error, while the backlit display ensures clarity, even in low-light conditions. Pair it with Hach's EPA-approved reagents for reliable, regulation-compliant results. Compact and Reliable Lightweight yet robust, this single-parameter colorimeter is part of Hach's trusted family of instruments known for delivering precision in water quality testing. Whether you're in the field or on the road, the DR300 offers a dependable solution for your chlorine analysis needs.