Process
Designed for precise pH / ORP, Dissolved Oxygen, Conductivity / Resistivity / TDS, Free Chlorine control at complex industrial sites or in harsh environment, with high anti-interference, these waterproof Controller / Transmitters can be wall-mounted and panel-mounted. In connection with the appropriate sensors, they give you accurate and reliable online readings all the time. They are just the one-stop water solutions you are looking for. 
2000 series 2-Wire Transmitters
3000 series Economical Controllers/Transmitters
5000 series Versatile Controllers/Transmitters
5500 series Wall-mounting Controllers/Transmitters