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The Pyxis ST-601 inline probe measures mass/mass concentration of chlorine dioxide (ClO2) in realtime between the range of 0.01% to 0.35%.




(ClO2 sensor)

The Pyxis ST-601 inline probes are uniquely designed to measure mass/mass concentration of chlorine dioxide (ClO2) in realtime between the range 0.01-0.35%. They measure the optical absorbance of the ClO2 solution using a UV light source. The probes have a built-in reference light source and a reference light detector in addition to the main light source and main light detector. They can be connected to any device that accepts an isolated or non-isolated 4-20mA input or RS-485 Modbus. As with all Pyxis inline sensors, the ST-601 probes can be wirelessly accessed via Bluetooth when used in conjunction with the MA-WB Bluetooth Adapter or PowerPACK series auxiliary box and the uPyxis App for mobile phones and PCs.
Manufactured by: Pyxis Lab Inc., USA

  • Bio-control for industrial water
  • Industrial oxidiser generation (i.e. hypochlorite/monochloramine)
  • Swimming pools and spas
  • Hospitals
  •   Key Features 
  • The probe can be conveniently connected to the suction or discharge side of the pump in both inline Tee (ST-001) or ¼” Teflon tubing format with using a union. Both included with probe
  • The probe can be calibrated with a mobile app or PC software via an MA-WB Bluetooth adapter or PowerPACK series auxilary box
  • Can wirelessly be calibrated using known chlorine dioxide concentration standards via uPyxis App for mobile phones or PCs
  •   Specifications 
  • Target: Chlorine dioxide (mass/mass)
  • Range: 0.01% to 0.35 %
  • Resolution: 0.01%
  • Accuracy: ±2% of reading or 0.1 percentage, whichever is greater
  • Method: UV absorbance
  • Power supply: 24 (±2) VDC, 65 mA
  • Outputs: Isolated 4-20mA analog output, isolated RS-485 digital output, supporting MODBUS protocol
  • Dimension: 6.8 inch length, 1.44 inch body diameter
  • Weight: 0.37 pounds
  • Installation formats: ¼” OD (7 mm) Teflon tubing for measurement flow, ST-001 Inline Tee ¾” CPVC
  • Material: CPVC
  • Pressure: 100 psi (6.9 Bar)
  • Temperature: 4°C to 40 °C (40°F to 104°F) operating, -7°C to 60°C (20°F to 140°F) storage
  • Cable length: 5 feet (bulkhead cable with IP67 adapter), 1.5 foot flying lead cable with IP67 adapter, optional extension cables available
  • Calibration: Two-point calibration against known ClO2 concentration standards
  • Rating: IP67
  • Regulation: CE marked
  • Long maintenance and calibration cycle: 6 months typically
  • Diagnostic information (probe tubing fouling and failure modes) can be communicated to digital displays via Modbus RTU

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