Pyxis ST-773 CPVC Submersed/Inline Dissolved Oxygen Sensor
CPVC luminescent DO sensor, submersed or inline use, 10m cable (0.004-20ppm). 4-20mA + RS-485, 7-pin.
Pyxis ST-773 CPVC Submersed/Inline Dissolved Oxygen Sensor
The Pyxis ST-773 is a CPVC luminescent dissolved oxygen sensor for submersed or inline installation, measuring 0.004-20ppm without the membrane replacement or electrolyte refills required by older galvanic and polarographic sensors. It comes with a 10m cable and outputs data via 4-20mA analog and RS-485 Modbus through a 7-pin connector.
Description
The Pyxis ST-773 is a CPVC-bodied luminescent (optical) dissolved oxygen sensor designed for either submersed or inline installation in water treatment and process monitoring systems. Unlike older galvanic and polarographic DO sensors, its optical measurement method eliminates the need for periodic membrane replacement and electrolyte refills, reducing ongoing maintenance demands.
The ST-773 measures dissolved oxygen across a wide 0.004-20ppm range, making it suitable for general process and environmental DO monitoring applications. It is supplied with a 10m cable and connects via a 7-pin connector, with data available through both 4-20mA analog and RS-485 Modbus outputs for straightforward integration into existing control and SCADA systems.
This sensor is well suited to plant operators and engineers who need reliable, low-maintenance DO monitoring across submersed tank or inline pipe installations.
Why Use This
Maintenance-Free Optical Sensing
Luminescent DO measurement eliminates the membrane replacement and electrolyte refills required by older galvanic and polarographic sensors.
Flexible Installation
CPVC construction supports both submersed and inline mounting for varied monitoring setups.
Dual Communication Output
4-20mA analog and RS-485 Modbus outputs integrate easily with existing control systems.
Applications
- Submersed dissolved oxygen monitoring — for tanks and basins where direct immersion installation is required
- Inline dissolved oxygen monitoring — for pipe-mounted installation in continuous process flows
- Water and wastewater treatment — general DO tracking as part of aeration and process control
FAQ
How does the ST-773 differ from a traditional galvanic or polarographic DO sensor?
The ST-773 uses luminescent (optical) sensing technology, which avoids the membrane replacement and electrolyte refills that galvanic and polarographic sensors require, lowering routine maintenance.
Can this sensor be installed inline as well as submersed?
Yes. The CPVC body is designed to support both submersed and inline installation configurations.
What is the measurement range and cable length?
The sensor measures dissolved oxygen from 0.004 to 20ppm and is supplied with a 10m cable.
How does the sensor output data to a control system?
It provides dual output via 4-20mA analog and RS-485 Modbus through a 7-pin connector.
Resources
Related Products
Stainless steel dechlorination sensor measuring Free Chlorine (0-5ppm) and Sulfite (0-100ppm) simultaneously, plus pH. Sensor only, no flow reservoir. Dual 4-20mA + RS-485.
Inline digital refractometer measuring refractive index, %BRIX, and both mono-ethylene and mono-propylene glycol concentration in one sensor. Suited to closed-loop glycol systems, sugar process monitoring, and data centre cooling loops.
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.