Digital Controllers

Looking for a set-and-forget controller that keeps your pool or spa water clean and safe, backed by a 5-year warranty?

CHEMTROL® digital controllers measure your water around the clock and switch the chemical feeders on and off as needed, so the sanitiser and pH stay where you set them without daily manual dosing. Proven in pools around the world for more than 30 years, they suit homes, commercial pools and spas, hotels, health clubs and light industrial sites. Every model carries a 5-year electronics warranty, with advice and support here in Australia.

Choose the CH230 to control the sanitiser by ORP (a measure of how actively the sanitiser is working), the CH240 for pH alone, or the CH250 for both. The CH255 measures free chlorine directly in ppm, as well as pH, and is not thrown off by stabiliser. The CH265 adds 4–20 mA outputs for municipal, industrial and larger facilities.

Which controller do I need?

You want to control…	Choose
Sanitiser only, with bromine, dichlor or another neutral sanitiser	CH230
pH only, for example in a pool with a salt chlorinator	CH240
Sanitiser (as ORP) and pH together, with chlorine or bromine	CH250
Free chlorine in ppm and pH together, including stabilised outdoor pools	CH255
Free chlorine and pH with 4–20 mA outputs, for industrial, municipal and larger facilities	CH265

Digital controller range

CHEMTROL® Selection / Features	Digital controllers
CHEMTROL® Selection / Features	CH230	CH240	CH250	CH255	CH265
pH Control		✓	✓	✓	✓
ORP Control	✓		✓
Sanitiser, Free Chlorine control (PPM)				✓	✓
4-20 mA Outputs	OPT	OPT	OPT	OPT	✓
Feed Mode: Manual, Automatic, Proportional	✓	✓	✓	✓	✓
Alarms: Audio, Visual, External	✓	✓	✓	✓	✓
Alarms: Out-of-Range, Runtime and Overfeed	✓	✓	✓	✓	✓