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Pyxis ST-525 Inline Fluorescein Sensor

Inline fluorescein tracer sensor (0-60ppb). 4-20mA + RS-485, 7-pin.

Pyxis
Inline Tracer Sensor
Chemical Dosing Tracking

Pyxis ST-525 Inline Fluorescein Sensor

Model:
ST-525
Brand:
Pyxis

The Pyxis ST-525 is an inline sensor that measures dye-tagged (fluorescein) treatment chemical dosing, supporting treatment chemical feed. It reports concentration across a 0-60ppb range and communicates via 4-20mA analog output and RS-485 Modbus through a 7-pin connector.

Real-time tracer monitoring — 4-20mA analog and RS-485 Modbus outputs feed data directly into control systems
Precise range coverage — calibrated to 0-60ppb for accurate tracking of treatment chemical levels
Real-time tracer monitoring — 4-20mA analog and RS-485 Modbus outputs feed data directly into control systems

Description

The Pyxis ST-525 is an inline fluorescein tracer sensor designed to track dye-tagged treatment chemical dosing directly within a process water line. By continuously reading dye concentration, it gives water treatment operators a real-time way to confirm that fluorescein-tagged chemical feed is reaching the target dose, rather than relying on periodic manual sampling.

The sensor measures across a 0-60ppb range and communicates results through both a 4-20mA analog output and RS-485 Modbus, wired through a single 7-pin connector. This dual-output design lets it feed readings into a PLC, chart recorder, or SCADA/BMS system for automated feed control and trend logging.

It suits treatment providers and plant operators who need continuous, unattended verification of dye-tagged chemical dosing in boiler, cooling, or process water systems.

Why Use This

Continuous tracer monitoring

Measures dye-tagged (fluorescein) treatment chemical dosing in real time across a 0-60ppb range, giving operators direct visibility into treatment chemical performance.

Easy control system integration

Dual 4-20mA analog and RS-485 Modbus outputs through a 7-pin connector let the sensor feed data straight into existing SCADA or controller setups.

Applications

  • Treatment chemical feed verification — confirms dye-tagged chemical is dosing at the intended rate
  • Boiler and process water treatment — continuous inline monitoring of treatment chemistries
  • Control system integration — feeds real-time tracer data into PLC/SCADA via 4-20mA or RS-485 Modbus
  • Low-concentration dosing programs — suited to trace-level fluorescein tracking at 0-60ppb

FAQ

What does the ST-525 measure?

It measures the concentration of dye-tagged (fluorescein) treatment chemical in a process water stream, reporting results on a 0-60ppb scale.

How is the sensor installed?

The ST-525 is an inline sensor that mounts directly into the process water line for continuous, in-line monitoring.

How does it connect to my control system?

It provides a 4-20mA analog signal and an RS-485 Modbus digital output through a 7-pin connector, so it can feed data into most standard control and monitoring equipment.

Is this sensor suited to low-concentration tracking?

Yes, its 0-60ppb range is calibrated for tracking treatment chemical levels at low, trace concentrations typical of dye-tagged feed programs.

Download

D25 Product Datasheet
PDF · 1.2 MB
Installation Manual
PDF · 0.8 MB

Resources

How to Size a Chemical Dosing Pump for Water Treatment
Technical Article · 8 min read
Understanding Water-Powered vs Electric Dosing Pumps
Technical Article · 6 min read
Poultry Medication Dosing — Case Study
Case Study · Selangor Poultry Farm
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