Multi-parameter pH sensor ST-765SS Series

RS-485Modbus RTU

The Pyxis ST-765SS Series are stainless steel multi-parameter membrane-less sensors based on unique electrochemical principles to determine numerous oxidizers including free-residual chlorine and chlorine dioxide plus pH and temperature of water. These sensors incorporate Pyxis’ advanced technology in the field of bare-gold electrochemical detection. Offered in two formats, the ST-765SS-FCL (free-residual chlorine + pH) and the ST-765SS-CLO (chlorine dioxide + pH) can simultaneously compensate for temperature and pH in the measurement of oxidizer based on real-time 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 and ISO-7393 guidelines. Key Benefits: • Real-Time pH + Oxidizer (0-5ppm) Detection • Dual 4-20mA Outputs (Oxidizer + pH) and RS-485 (Modbus RTU) • Optional FR-300-PLUS auto-brushing flow reservoir for dirty water applications • Integrated RTD & pH Compensation to pH 9.0 of the Oxidizer Value • Replaceable EH-765 Reference Electrode Assembly – Simple Maintenance Typical Applications: • Potable water • Secondary water supply • Industrial water • Domestic water • Cooling tower water