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This inline sensor measures both – PTSA (365nm ex/410nm em) and “Fluorescent Polymer” (410nm ex / 450nm em); for use in industrial water cooling and process treatment applications.




(Tagged Polymer + PTSA Inline Sensor)

The ST-588 uses Pyxis' proprietary algorithms to determine the concentrations of PTSA and active polymer residue simultaneously, while measuring the sample turbidity and colour in highly contaminated waters (i.e. <150 NTU and 10 ppm Fe) for internal compensation. This sensor is a combination of dual (2x) 4-20mA as well as RS-485 Modbus output signals, one for PTSA and one for fluorescent polymer. The ST-588 is Bluetooth enabled for wireless cleanliness diagnostics and calibration. 
Manufactured by: Pyxis Lab Inc., USA

  • Industrial water cooling
  • Process treatment
  •   Technical Specifications 
  • Part Number (P/N): 50692
  • Fluorescent Polymer Range †: 0.0–20.0 ppm
  • Fluorescent Polymer Accuracy: ±0.1 ppm
  • PTSA Range: ±0.0–200.0 ppb
  • PTSA Accuracy: 1 ppb
  • Excitation Wavelength: 410 nm (Fluorescent Polymer) 365 nm (PTSA)
  • Emission Wavelength: 450 nm (Fluorescent Polymer) 410 nm (PTSA)
  • Wavelength Accuracy: 1 nm
  • Calibration: Two-point calibration against standard solution
  • Outputs: 2x; 4–20mA analog output, RS-485 digital output with Modbus protocol
  • Installation: Custom tee assembly (P/N: ST-001) with 3/4” FNPT socket and threaded ports
  • Cable Length: 5 ft with IP67 connectors and 1.5 ft flying lead with IP67 adapter
  • Power Supply: 22–26 VDC, 1.8 W
  • Dimension: 6.8 1.44 inch (172.7)
  • Weight: 0.37 lbs (170 g)
  • Material: UPVC
  • Operational Temperature: 40–104°F (4–40°C)
  • Storage Temperature: 20–140°F (-7–60°C)
  • Pressure: Up to 100 psi (0.7 MPa)
  • Enclosure Rating: IP67
  • Regulation: CE
  • Automatic compensation for turbidity; up to 150 NTU and colour created by up to 10 ppm iron or equivalent to 10 ppm humic acid
  • Easy calibration using the uPyxis® mobile or desktop app
  • Diagnostic information (sensor fouling, colour or turbidity over a range, failure modes) available in the uPyxis® app or via Modbus RTU
  • Easy to remove from the system for cleaning and calibration without the need for any tools

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