Overview
The ST-765SS Series are stainless steel multi-parameter membrane-less sensors. Based on unique electrochemical principles to determine an oxidizer and pH content in water. These sensors incorporate Pyxis Lab® advanced technology in the field of bare-gold electrochemical detection. The ST-765SS Series integrates an oxidizer measurement (Free Chlorine, Chlorine Dioxide, Sulfite, Bromine, Monochloramine, etc.) plus pH measurement. Both can perform temperature and pH compensation. For the measurement of the oxidizer based on the conditions present in the application of use. This unique internal compensation results in a highly accurate oxidizer measurement. Consistent with DPD wet chemistry methodology as high as a pH of 9.0 and is compliant with USEPA-334.0 & ISO-7393 guidelines. The ST-765SS Series sensors offer a replaceable, front-loading reference electrode assembly. Independently developed by Pyxis Lab®, eliminating the shortcomings associated with membranes and gel replacement while offering reduced polarization time on startup, offering an electrode life span potential of up to 2 years. The flat front-end is platform less prone to contamination or fouling and is easy to clean. The ST-765SS Series sensor body is composed of 304 Stainless Steel and is well suited for aggressive environments. Details The ST-765SS Series offer (2) 4-20mA and RS-485 Modbus outputs and is Bluetooth® 5.0 enabled when used with the MA-CR Bluetooth® adapter. The world’s first four-electrode composite sensor that provides three measured parameters including Free Chlorine or Chlorine Dioxide, pH and Temperature with one sensor RS-485 Modbus output. The ST-765SS is the best choice for potable water, secondary water supply, domestic water, decorative water and other clean water applications. Features Real-Time pH + Oxidizer (0-5ppm) Detection Dual 4-20mA Outputs (Oxidizer+ pH) and RS-485 Bluetooth® Enabled when used with MA-CR Adapter Wireless for uPyxis Calibration Integrated RTD & pH Compensation to pH 9.0 of the Oxidizer Value Replaceable EH-765 Reference Electrode Assemble for Simple Maintenance
Specifications
| Manufacturer | Pyxis Lab |
|---|---|
| Model | ST-765SS |
| Part number series | 5360X — a configurable series; the exact part number depends on the option selected and is confirmed at quote |
| Product type | Inline Sensors |
Documentation
Specifications reproduced from the manufacturer's published product information (pyxis-lab.com), retrieved 18 August 2026. Pyxis Lab is a trademark of its owner. Confirm all specifications with ForeverPure before purchase.
