Portable, direct-reading residual chlorine meter for water analysis. Range 0~2mg/L [ppm]. Reagent-free measurement with electrode, 3m cable, float and sample container for in-situ or grab-sampling. Compatible with direct chlorination, hypochlorite or dichloroisocyanurate dosing. Calibration data stored in electrode with correlation with DPD methods. Waterproof to IP67. ISO validation functions, storage of 300 measurements and RS232 printer output. Battery operated.