Erlanger, Ky.-based Palintest’s Chlorometer Duo is a new hand-held chlorine meter with an exceptionally broad measurement range. This single instrument lets water engineers and contractors measure the high chlorine levels used for pipework sterilization as well as the low residual disinfectant levels in treated drinking water. The Chlorometer Duo is calibrated to monitor residual chlorine using the internationally recognized DPD standard method. This test reveals both free and total chlorine in the 0-5 ppm range.