SANITIZER and pH Control Made Easy CHEMTROL® 250 is a microprocessor-based digital controller designed to maintain both sanitizer ORP (oxidation-reduction potential or Redox) 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 Sanitizer control pH control Separate Adjustable Set-points 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 ORP CONTROL Adjustable from 200 to 999 mV pH CONTROL Adjustable from 0.0 to 14.0 ORP SENSOR Platinum electrode with 3 m cable pH SENSOR Glass electrode with 3 m cable READOUTS ORP (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