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Based on the principle of fluorescence quenching, these dissolved oxygen sensors determine the dissolved oxygen content in water.




(Dissolved oxygen sensor)

The ST-772 dissolved oxygen (DO) sensor is based on the principle of fluorescence quenching to determine the dissolved oxygen content in water. It incorporates Pyxis’ advanced technology in the field of fluorescence detection. It uses dual light source detection technology with excitation and reference light sources, offering a wide detection range and low detection limit. This sensor integrates temperature and pressure sensors, to perform temperature and pressure compensation for the measurement of dissolved oxygen based on ambient environmental conditions present in the application of use.
Manufactured by: Pyxis Lab Inc., USA

  • Activated sludge/Aerated basin
  • Wastewater and sewage processing
  • Chemical and process water
  • Domestic water
  • Filtration
  • Aquaculture
  • Agriculture
  •   Key Features 
  • 0.004-20 mg/l measurement range
  • Built-in transmitter without pre-amplifier or meter head
  • Dual outputs both 4-20mA isolated signal and RS-485 Modbus
  • Wireless calibration, diagnostics, and data trends via the uPyxis® app when used with MA-CR Bluetooth adapter
  •   Technical Specifications 
  • P/N: 53703
  • Body Material: 304SS
  • Installation Method: Submerged
  • Measuring Range (4-20mA Output Scale): 0.004-20mg/L or 0-200%
  • Saturation or 0-500mbarP02
  • Resolution: 0.01mg/L
  • Accuracy: ± 0.1mg / L or ± 1%, whichever is greater
  • Light Source: Blue light irradiated emission red light quenching excitation
  • Response Time: <60 seconds
  • Operational Temperature: 0°C – 45°C (32 – 113°F)
  • Operating Voltage: 22 – 26V DC, power 0.6W
  • Signal Output: 4-20mA analog output/RS-485 digital output
  • Dimension (L x D): 296x33.6 mm (11.65x1.32 inches)
  • Weight: 760 g (1.67 lb) cable excluded
  • Working Pressure: 145 psi
  • Wet Material: 304SS/Polycarb
  • Cables Provided: 4.9ft/1.5m flying lead cable – 8Pin 30ft/10m bulkhead cable
  • Calibration: Slope calibration air or air saturated water
  • Zero calibration: 5% Sodium Sulfite or Nitrogen gas
  • DO Membrane Cap Life: 2 years
  • Protection Grade: IP-67/IP-68
  • Regulation: CE/RoHS
  • Compliance: USEPA 40CFR Part 136.3
  • Simple DO membrane cartridge replacement every 2 years
  • Scratch-resistant membrane
  • Accurate and stable measurement – no calibration required for up to 2 years

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