The ST-765SS Series is a stainless steel-bodied, membrane-less multi-parameter sensor built on Pyxis Lab’s bare-gold electrochemical detection technology. This DCL variant measures Free Chlorine and Sulfite simultaneously alongside pH and temperature, sensor-only, with no flow reservoir kit included. Suited to dechlorination monitoring where residual oxidizer and neutraliser dosing both need tracking in one pass.

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.

Key specifications:

• Sensor body material: Stainless steel
• Free chlorine range: 0-5ppm, Sulfite range: 0-100ppm
• Outputs: 2x isolated 4-20mA analog, RS-485 digital, 8-pin connector
• Configuration: Sensor only, no flow reservoir
• Typical electrode service life: 2 years