The ST-765SS Series is a stainless steel-bodied, membrane-less multi-parameter sensor built on Pyxis Lab’s bare-gold electrochemical detection technology. It measures a chosen oxidizer species alongside pH and temperature in a single probe, with internal temperature and pH compensation, keeping oxidizer readings consistent with DPD wet chemistry.

This is the sensor-only variant, with no flow reservoir kit included, for installations with an existing flow cell or in-line tee. The reference electrode assembly is replaceable and front-loading, giving reduced polarisation time on startup and a typical electrode service life of up to 2 years.

Dual isolated 4-20mA outputs plus RS-485 Modbus support integration with a PLC, SCADA, or third-party controller via the 8-pin connector. The stainless steel body suits industrial and wastewater applications where a CPVC body would not be appropriate.

Key specifications:

• Sensor body material: Stainless steel
• Free chlorine range: 0-5ppm
• Outputs: 2x isolated 4-20mA analog, RS-485 digital, 8-pin connector
• Configuration: Sensor only, no flow reservoir
• Typical electrode service life: 2 years