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The ST-500 series expands the target of measurement to a broad range of analytes, including fluorescein and naphthenic disulfonic acid (NDSA) to bring the success of traced cooling programs to boilers and other applications.




(PTSA tracing)

The ST-500 inline fluorometer is a model for real-time monitoring of inhibitor dose with high accuracy and proven robustness in the application of fluorescence traced cooling programs. It is primarily used for feedback control to maintain the dosed concentration within a narrow band around the set point regardless of changes in cycle or heat load dynamics.
Manufactured by  Pyxis Lab Inc., USA

      Key Features 
  • Eliminates color and turbidity interference
  • ST500RO = PTSA for RO (0ppb to 40ppb)
  • 4mA to 20mA and Modbus RS485 connection
  • Probe fouling diagnostics through PC
  • High resistance to colour and turbidity interference from sample water
  • Digital communication via Bluetooth to smartphone app for diagnosis and troubleshooting
  •   Specifications 
  • Power supply required: 24 (±2) VDC @ 65 mA
  • Signal output: 4-20 mA and RS-485 Modbus RTU
  • Temperature, sample water: 40°F to 104°F (4°C to 40°C)
  • Temperature, ambient during operation: 40°F to 120°F (4°C to 49°C)
  • Temperature, ambient during storage: 20°F to 140°F(-7°C to 60°C)
  • Sample pressure: 100 PSI
  • Cable length: 5 feet, terminated with IP67 connectors
  • Waterproof connector
  • Dimensions: 172.7mm length, body diameter 36.6 mm
  • Weight: 170g
  • PTSA measuring range: 0ppb to 40ppb (3σ error: ±0.2ppb)
  • Regulatory: CE marked
  • Highly stable and extremely reliable even in harsh applications

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