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Pyxis Dissolved Oxygen Sensors
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 and uses dual light source detection technology with excitation and reference light sources, offering a wide detection range and low detection limit.
Features & Benefits
Features:
- 0.004-20mg/L measurement range
- No Membrane Replacement or Electrolyte Replacement
- Simple DO Cartridge Replacement every 2 years
- Built-in temperature and pressure sensor with automatic compensation
- Accurate and stable measurement with ultra-low drift requiring no calibration for up to 2-years
- Built-in transmitter without preamplifier or meter head
- Dual Outputs both 4-20mA isolated signal and RS-485 Modbus
- Wireless Calibration, Diagnostics, Data Trend via uPyxis APP when used with MA-CR Bluetooth Adapter
- Slope calibrate with air or air saturated water / Zero calibrate with 5% Sulfite solution or Nitrogen Gas
-
Submersible (ST-772 or ST-772P) or Inline Pipe Tee (ST-772T or ST-772T-P) installation versions available
Typical Applications:
- Activated Sludge / Aeration Basin / Nutrient Removal
- Wastewater / Sewage Processing
- Chemical / Process Water Applications
- Domestic / Drinking Water Applications
- Filtration Applications
- Aquaculture
- Agriculture
- Compliant USEPA 40CFR Part 136.3 as an approved method for measurement of dissolved oxygen in wastewater, drinking water and direct discharge.
Additional Notes
Specifications:
| Item | ST-772 | ST-772-P | ST-772T | ST-772T-P |
|---|---|---|---|---|
| P/N | 53703 | 53720 | 53719 | 53721 |
| Body Material | 304SS | CPVC | 304SS | CPVC |
| Installation Method | Submerged Installation | Submerged Installation | ByPass / Inline Installation | ByPass / Inline Installation |
| Measuring Range (4-20mA Output Scale) | 0.004-20mg/L or 0-200% Saturation or 0-500mbarP02 | 0.004-20mg/L or 0-200% Saturation or 0-500mbarP02 | 0.004-20mg/L or 0-200% Saturation or 0-500mbarP02 | 0.004-20mg/L or 0-200% Saturation or 0-500mbarP02 |
| Resolution | 0.01mg/L | 0.01mg/L | 0.01mg/L | 0.01mg/L |
| Accuracy | ± 0.1mg / L or ± 1%, whichever is greater | ± 0.1mg / L or ± 1%, whichever is greater | ± 0.1mg / L or ± 1%, whichever is greater | ± 0.1mg / L or ± 1%, whichever is greater |
| Light Source | Blue Light Irradiated Emission / Red Light Quenching Excitation | Blue Light Irradiated Emission / Red Light Quenching Excitation | Blue Light Irradiated Emission / Red Light Quenching Excitation | Blue Light Irradiated Emission / Red Light Quenching Excitation |
| Response Time | <60 Seconds | <60 Seconds | <60 Seconds | <60 Seconds |
| Operational Temperature | 0 °C – 45 °C (32 - 113° F) | 0 °C – 45 °C (32 - 113° F) | 0 °C – 45 °C (32 - 113° F) | 0 °C – 45 °C (32 - 113° F) |
| Operating Voltage | 22 – 26V DC, Power 0.6W | 22 – 26V DC, Power 0.6W | 22 – 26V DC, Power 0.6W | 22 – 26V DC, Power 0.6W |
| Signal Output | 4-20mA analog output / RS-485 digital output | 4-20mA analog output / RS-485 digital output | 4-20mA analog output / RS-485 digital output | 4-20mA analog output / RS-485 digital output |
| Dimension (L x D) | 296 x33.6 mm (11.65x 1.32 inches) | 296 x33.6 mm (11.65x 1.32 inches) | 296 x33.6 mm (11.65x 1.32 inches) | 296 x33.6 mm (11.65x 1.32 inches) |
| Weight | 760 g (1.67 lb) cable excluded | 760 g (1.67 lb) cable excluded | 760 g (1.67 lb) cable excluded | 760 g (1.67 lb) cable excluded |
| Working Pressure | 145 psi | 145 psi | 145 psi | 145 psi |
| Wet Material | 304SS/Polycarb | CPVC/Titanium | 304SS/Polycarb | CPVC/Titanium |
| Cables Provided | 4.9ft/1.5m Flying Lead Cable – 8Pin / 30ft/10m Bulkhead Cable – 8Pin | 4.9ft/1.5m Flying Lead Cable – 8Pin / 30ft/10m Bulkhead Cable – 8Pin | 4.9ft/1.5m Flying Lead Cable – 8Pin / 4.9ft/1.5m Bulkhead Cable – 8Pin | 4.9ft/1.5m Flying Lead Cable – 8Pin / 4.9ft/1.5m Bulkhead Cable – 8Pin |
| Calibration | Slope calibration Air or Air Saturated Water / Zero calibration: 5% Sodium Sulfite or Nitrogen Gas | Slope calibration Air or Air Saturated Water / Zero calibration: 5% Sodium Sulfite or Nitrogen Gas | Slope calibration Air or Air Saturated Water / Zero calibration: 5% Sodium Sulfite or Nitrogen Gas | Slope calibration Air or Air Saturated Water / Zero calibration: 5% Sodium Sulfite or Nitrogen Gas |
| DO Membrane Cap Life | 2 years | 2 years | 2 years | 2 years |
| Protection Grade | IP-67/IP-68 | IP-67/IP-68 | IP-67/IP-68 | IP-67/IP-68 |
| Regulation | CE / RoHS | CE / RoHS | CE / RoHS | CE / RoHS |
| Compliance | USEPA 40CFR Part 136.3 | USEPA 40CFR Part 136.3 | USEPA 40CFR Part 136.3 | USEPA 40CFR Part 136.3 |
Call or text: +1 (484) 544-0506
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