Electro-Chemical Devices’ (ECD) DC80 De-Chlorination Analyzer utilizing a “zeroshift” method ensures stable and reliable chlorine measurement and protects total chlorine sensors from damage while monitoring near zero, total chlorine amounts. Chlorine is metered into the sample, shifting the zero from a near zero chlorine concentration to a measurable value. The analyzer monitors chlorine in drinking water, wastewater, cooling water and other applications from 0.05 to 20 ppm. It features built-in automatic pH compensation for samples between 4 and 12 pH.