Pyxis ST-765SS-FCL Free Chlorine + pH Sensor – Sensor Only (Stainless Steel)
Stainless steel free chlorine + pH sensor, 0-5ppm, sensor only with no flow reservoir. Dual 4-20mA + RS-485, 8-pin connector.
Pyxis ST-765SS-FCL Free Chlorine + pH Sensor – Sensor Only (Stainless Steel)
The ST-765SS-FCL sensor-only variant is a stainless steel-bodied, membrane-less sensor that measures Free Chlorine (0-5ppm) alongside pH and temperature using Pyxis Lab's bare-gold electrochemical detection technology. It ships without a flow reservoir kit, for installations with an existing flow cell or in-line tee. The replaceable front-loading reference electrode gives a typical service life of up to 2 years.
Description
The ST-765SS-FCL sensor-only variant is a stainless steel-bodied, membrane-less sensor that measures Free Chlorine (0-5ppm) alongside pH and temperature, using Pyxis Lab’s bare-gold electrochemical detection technology with internal compensation to keep readings consistent with DPD wet chemistry. The stainless steel body suits industrial and wastewater applications where a CPVC body would not be appropriate.
This configuration ships without a flow reservoir kit, intended for installations that already have an existing flow cell or in-line tee in place, avoiding the cost of duplicate flow hardware. The reference electrode assembly is replaceable and front-loading, giving reduced polarization time on startup and a typical service life of up to 2 years.
Dual isolated 4-20mA outputs plus RS-485 Modbus, connected via an 8-pin connector, support integration with a PLC, SCADA, or third-party controller for industrial free chlorine monitoring and dosing control.
Why Use This
Fits Existing Installations
Ships without a flow reservoir kit, making it a direct fit for sites with an existing flow cell or in-line tee.
Built for Industrial Duty
The stainless steel body handles industrial and wastewater applications where a CPVC sensor body would not be appropriate.
Lower Maintenance
The replaceable, front-loading reference electrode gives a typical service life of up to 2 years.
Applications
- Industrial wastewater treatment — stainless steel body suited to demanding process environments
- Retrofit into existing flow cells or in-line tees — sensor-only configuration avoids duplicate flow hardware
- PLC/SCADA-integrated chlorine control — dual 4-20mA and RS-485 outputs via 8-pin connector
FAQ
Does this variant include a flow reservoir kit?
No, this is the sensor-only configuration, intended for installations that already have an existing flow cell or in-line tee.
What water types is the stainless steel body designed for?
It suits industrial and wastewater applications where a CPVC body would not be appropriate.
What is the free chlorine measurement range?
It measures 0-5ppm free chlorine, alongside pH and temperature.
How long does the reference electrode typically last?
The replaceable, front-loading electrode has a typical service life of up to 2 years.
Resources
Related Products
Stainless steel ozone + pH sensor, 0-2ppm, sensor only with no flow reservoir. Dual 4-20mA + RS-485, 8-pin connector.
CPVC dechlorination sensor measuring Free Chlorine (0.00-5.00ppm) and Sulfite (0.0-100.0ppm) simultaneously, plus pH and temperature. Replaceable front-loading reference electrode, Bluetooth-ready with MA-CR adapter.
Compact dual-channel controller for pH and ORP monitoring with direct pulse output to dosing pumps.
PVDF injection quill with integral non-return valve for safe chemical injection into pressurised pipelines.
Other Models in This Line
Latest Resources
Need help with selection or sizing?
Our engineers are ready to evaluate your requirements and recommend the right solution.