SANITIZER and pH Control Made Easy CHEMTROL® 255 PPM/pH Digital Controller introduces the new Sensor for Free Chlorine control. A microprocessor-based digital controller, designed to maintain both free chlorine (PPM) and water pH in Residential Pools and Spas, Commercial Pools and Spas, Hotels, Motels, Health Clubs, Apartments Buildings, Condo associations and Industrial Water Treatment. Simplicity of installation, Compatible with all common sanitizers and oxidizers, ease of use and long-term reliability. STANDARD FEATURES Easy to install, Simple to use All Control Functions on Front Panel Free Chlorine control pH control Separate Adjustable Setpoints Separate Adjustable Alarms Out-of-range alarms Acid/Base Selector Proportional Feed with Adjustable Bandwidth Separate Adjustable Overfeed Safety Timers Waterproof Cabinet with Clear Window Cover 5-year Electronics Warranty PRECISE AND RELIABLE PPM READING The new Free Chlorine Sensor is a solid state sensor with a selective membrane that provides direct readings of Free Chlorine in water at concentrations ranging from 0.1 to 10 ppm (parts per million) or mg/l (milligrams per liter). These are true readings of Free Chlorine corresponding to the DPD #1 test. A significant advantage of this PPM sensor is that it’s not affected by cyanuric acid (CYA) stabilizer and/or oxidizers, thereby assuring constant Free Chlorine levels at all times. Unlike other chlorine sensors https://sbcontrol.com/probes-selection/ppm-sensors/on the market, this new sensor is easy to install and maintain and gives the operator precise and reliable control of Free Chlorine under the most difficult conditions. The PPM sensor is covered by a full 2-year warranty. CH255 SPECIFICATIONS free CHLORINE CONTROL Adjustable from 0.1 to 10.0 ppm (mg/l) or 0.01 to 2.0 (specify). pH CONTROL Adjustable from 0.0 to 14.0 FREE CHLORINE SENSOR Solid state electrode with 3 m cable pH SENSOR Glass electrode with 3 m cable READOUTS PPM (3 digits) and pH (2 digits) LEDs FEED MODES Manual, automatic, proportional ADJUSTMENTS Set-point, calibration, limits, feed rate INDICATORS LEDs for feed mode, feed status, alarms SAFETY Audio, visual and remote alarms Out-of-range limits and overfeed safety timers CABINET Polystyrene 22 x 18 x 10 cm ELECTRICAL 230V or 24 VAC (specify) PLUMBING PVC tees for 1-1/2″ or 2″ line WARRANTY 5 years on electronic module 1 year on all other parts SHIPPING 30 x 30 x 30 cm carton, 3 kg without pumps 6 kg with 2 chemical feed pumps