The ST-765P Series is a CPVC-bodied, membrane-less multi-parameter sensor built on Pyxis Lab’s bare-gold electrochemical detection technology. This O3 variant measures ozone alongside pH and temperature in a single probe, with internal temperature and pH compensation up to pH 9.0.

The reference electrode assembly is replaceable and front-loading, developed independently by Pyxis Lab to avoid the membrane and gel replacement associated with older amperometric designs. This gives reduced polarisation time on startup and a typical electrode service life of up to 2 years. The flat front-end resists fouling and is straightforward to clean in place.

Dual isolated 4-20mA outputs plus RS-485 Modbus support integration with a PLC, SCADA, or third-party controller. Add the MA-CR Bluetooth Adapter for wireless calibration and diagnostics through the uPyxis mobile app. The CPVC body suits clean water applications: potable water, secondary water supply, domestic water, and decorative water features.

Key specifications:

• Sensor body material: CPVC, plastic
• Oxidizer range: 0.00-2.00ppm O3
• Oxidizer precision: ±0.01mg/L or 1% of value, with pH compensation up to 9.0
• pH range/precision: 0-14, ±0.01
• Sample inlet pressure: 7.25-30psi (0.05-0.2MPa)
• Power supply: 22-26VDC, 2W
• Outputs: dual isolated 4-20mA analog, isolated RS-485 digital
• Operating temperature: 4-40°C
• Max sensor pressure: 100psi (6.9 bar)
• Regulation: CE / RoHS. Compliance: EPA 334.0 / ISO 7393
• Typical electrode service life: 2 years