Chemtrol 255 PPM-pH digital swimming pool chemical controller is the answer to the long awaited breakthrough in automated water treatment for free chlorine. Chemtrol’s proprietary new PPM sensor is a solid state sensor with a selective membrane that provides direct readings of free chlorine in concentrations of 0.1 to 10 ppm (parts per million) or mg/l (milligrams per liter). The Chemtrol 255 PPM/pH digital controller includes flow cell (only). 110 volt.
Not to be used in the state of Ohio.
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