Zodiac - pH 7.5 buffer solution for pH sensor 70 ml - R0800900

Zodiac – pH 7.5 buffer solution for pH sensor 70 ml – R0800900

The Zodiac R0800900 is a 70 ml pH 7.5 buffer solution designed specifically for calibrating the pH sensors used in Zodiac’s range of automatic pool water management systems. Accurate pH measurement is fundamental to maintaining safe and balanced pool water, and sensor calibration is an essential maintenance step that ensures readings remain reliable over time. This buffer solution provides a stable, certified reference point at pH 7.5, allowing the sensor to be correctly zeroed and adjusted so that the controller can make precise dosing decisions.

Buffer solutions work by resisting changes in pH when small amounts of acid or base are introduced, making them ideal as calibration references. The 7.5 value is particularly relevant for pool water management because it sits within the ideal swimming pool pH range of 7.2–7.6, meaning calibration at this point reflects the real operating conditions of the sensor. Using the correct Zodiac-branded buffer solution guarantees chemical compatibility and measurement traceability aligned with the manufacturer’s specifications.

Technical characteristics and compatibility

This buffer solution comes in a compact 70 ml bottle, which is sufficient for multiple calibration cycles when used as directed. It is formulated to deliver a stable pH reading at 7.5, and its chemical composition is designed to remain consistent under normal storage conditions. The solution is intended for use with Zodiac pH electrode sensors as found in systems including the Tri pH, Tri Pro, pH Link, and Dual Link product lines. Regular calibration using this solution helps maintain the long-term accuracy of the pH probe, extending its useful service life and reducing the risk of incorrect chemical dosing. Alongside a pH 4.0 or pH 10.0 reference solution, it can be used as part of a two-point calibration procedure for even greater sensor accuracy.

Suitability and application

This buffer solution is intended for pool owners and maintenance professionals who use Zodiac automatic pH control or combined chlorine and pH electrolysis systems. It is suitable for use with both residential and light commercial pool installations where Zodiac water management equipment is installed. Periodic calibration is recommended as part of the regular maintenance schedule — typically at the start of each pool season and at regular intervals during the swimming season — to ensure the control system continues to manage water chemistry reliably. It is not a chemical treatment product for the pool water itself, but solely a calibration reference fluid for sensor maintenance.