Description
Zodiac redox probe for dosing pump R0819900
The Zodiac redox probe for dosing pump R0819900 is the original P19 ORP sensor with integrated cable and BNC connector for automatic disinfection control.
It continuously measures the oxidation reduction potential (redox) in the pool water so the dosing pump or controller can adjust chlorine production
accurately and keep the water safely disinfected.
Main features of the Zodiac redox probe R0819900
- Original Zodiac P19 redox (ORP) probe for automatic pool water treatment.
- Approximate 3 metre shielded cable with BNC connector for a secure signal connection.
- Glass measuring tip protected by a durable plastic body for everyday use in pool water.
- Designed for continuous operation in saltwater and traditionally chlorinated pools.
- Suitable as a direct replacement for worn or unstable original redox sensors.
Compatibility with Zodiac dosing and control systems
This redox probe is used on a wide range of Zodiac automatic controllers and dosing pumps. It fits wherever the parts list specifies a P19 redox probe
under reference R0819900.
- Zodiac eXPERT salt chlorinators with redox regulation.
- Zodiac Tri pH and Tri Pro systems with integrated control.
- Zodiac pH Link and Dual Link modules.
- Chlor Expert and Chlor Perfect controllers from recent production years.
- Other treatment systems that explicitly list R0819900 as the replacement redox probe.
Always check the technical label on your controller and the exploded spare parts diagram. If the redox sensor is referenced as P19 with code R0819900,
this probe is the correct original replacement.
Redox measurement and when to replace the probe
The redox probe measures the oxidation reduction potential of the water, which indicates the disinfecting capacity of the chlorine present. A healthy,
well calibrated probe allows the dosing pump or salt chlorinator to maintain a stable and efficient level of disinfection with minimal manual
adjustments.
- Provides real time redox measurement to control chlorine dosing automatically.
- Helps keep water safe for bathers while avoiding excessive chlorine levels.
- Optimises chemical consumption by dosing only what is needed.
Like all redox electrodes, the Zodiac R0819900 probe is a consumable part. Its sensitivity and stability gradually decrease under the effect of time,
temperature, chemicals and deposits on the glass bulb.
- Replace the probe if redox readings no longer match manual measurements.
- Change it when the value is slow to stabilise or drifts after calibration.
- Install a new probe after mechanical shock, cracked glass or visible damage.
- Consider preventive replacement after several seasons of continuous use.
Installation guidelines for the Zodiac redox probe
The probe is usually installed in a dedicated probe holder or bypass line in the filtration circuit. Correct installation protects the sensor and
ensures accurate measurement.
- Keep the new probe in its protective cap with storage solution until the moment of installation.
- Switch off the controller and stop flow in the sampling line before removing the old probe.
- Unscrew the old sensor carefully and clean the probe holder, removing any deposits.
- Insert the new R0819900 probe into the holder and tighten by hand until the sealing ring is correctly compressed.
- Connect the BNC plug firmly to the redox input on the controller, making sure it is fully seated.
After installation, the probe must be calibrated according to the controller manual using fresh redox buffer solutions. Correct calibration is
essential for reliable automatic dosing.
Care and maintenance for long probe life
Good maintenance of the Zodiac redox probe for dosing pump R0819900 extends its service life and helps the controller regulate chlorine dosing with
precision.
- Rinse the glass tip gently with clean water when removing the probe; do not scratch or wipe it with abrasive cloths.
- Clean light deposits with a suitable redox probe cleaning solution when recommended.
- Never allow the measuring tip to dry out for extended periods; use storage solution during long shutdowns.
- Check and recalibrate the probe at the start of each season and after major water treatment changes.
With correct installation, regular calibration and basic care, the Zodiac redox probe for dosing pump R0819900 keeps automatic dosing systems working
reliably and maintains a stable disinfection level in the pool water.
