ST-765 Series Oxidizer and pH Sensor

Description

ST-765 Series Multi-Parameter Sensors — Available in Stainless Steel or CPVC

The ST-765 Series are high-performance, membrane-less sensors designed for accurate real-time monitoring of oxidizers, pH, and temperature — without the need for wet chemistry reagents.

Available in both stainless steel (SS) and CPVC materials, these sensors utilise Pyxis Lab®’s advanced bare-gold electrochemical technology to deliver precise oxidizer and pH measurements in various water applications. They support detection of Free Chlorine, Chlorine Dioxide, Sulfite, Bromine, Monochloramine, and more, with built-in pH and temperature compensation to ensure stable and reliable readings under changing conditions.

Thanks to integrated compensation algorithms, the ST-765 Series offers highly accurate oxidizer readings consistent with DPD wet chemistry — even at pH levels up to 9.0 — and complies with USEPA-334.0 and ISO-7393 guidelines.

Each sensor features a replaceable, front-loading reference electrode assembly developed by Pyxis Lab®, eliminating the need for membranes or gel replacement and reducing startup polarisation time. With routine maintenance, the electrode can last up to 2 years. The flat sensing surface is designed to resist fouling and is easy to clean, making the ST-765 Series ideal for demanding environments, whether in stainless steel or CPVC form.