... . 3.Range:0-20ppm ApplicationARCL200 used for drinking water treatment plant, drinking water, tap water, swimming pool, cooling circulating water, water treatment engineering, ... /L, PH value: 0-14 PH, temperature: 0 ~60°C2. Resolution: 0.001 mg/L, 0.01 mg/L, 0.01 ,0.1°C, pH3. ... size: 91 x 91 mm Swimming pool and drinking water free chlorine analyzer/residual chlorine controller/free chlorine sensor ...