H2O Rx supplies permanently installed controllers for chemical control and monitoring for the following:.
We follow a simple procedure:
- pH - Simple
- pH - Advanced
- ORP
- Combined pH and ORP
- pH & ORP Test and Troubleshooting
- Chlorine - Free and Residual
- Conductivity - Simple
- Conductivity - Advanced
- Temperature
We also supply the following controllers designed specifically for purpose:
H2O Rx does not represent a specific brand of controller. This allows us the flexibility to use our experience to select the best controller for your application.
Click here to email and describe your application or call on 0421 795 353.
Additional Resources
| Description | Downloads and Data |
| pH Controllers | |
| Simple pH Controller Operation Manual | PPH-1 Manual |
| Advanced pH Controller Operation Manual | DPH-64 Manual |
| ORP Controllers | |
| Simple ORP Controller Operation Manual | PMV-1 Manual |
| Combined pH and ORP | |
| Combined pH and ORP Operation Manual | DPH-4 Manual |
| Conductivity Controllers | |
| Simple Conductivity Controller Operation Manual | BCH-1 Manual |
| Advanced Conductivity and Temperature Controller Operation Manual | DCH-2 Manual |
| Special Purpose Controllers | |
| Cooling Tower Controller Operation Manual | CTH-2 6T Manual |
| CTH-2 6T Menu tree diagram | Cooling_New |
| Convert an old CTH-1 Controller to a CTH-2 6T | CTH-2_Panel |
| Convert an old CTH-3 Controller to a CTH-2 6T | CTH-2CV |
| Hand Held Meters | |
| SMH-2 - Operation Manual | SMH-2 Manual |
| Series 1152 - Very Low Conductivity Meter - Operation Manual | 1152-OP |
| Miscellaneous | |
| 4-20 mA output option for CTH-2 Controllers | CTH2_420MA |
| High Temperature probe option for Conductivity Controllers | HIGHTEMP |
| A simple conductivity calibration and test plug | TESTPLUG |
| Trouble shooting assistance where electrical current in un-earthed piping systems affects controllers | LOOP_PROBLEMS |
Last Updated: 25 February, 2026