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The Pyxis Lab® ST-772P optical luminescent dissolved oxygen (DO) sensor is based on the principle of ‘Fluorescence Quenching’ to determine dissolved oxygen content in water. This sensor incorporates Pyxis’ advanced technology in the field of fluorescence detection, using Blue/Red Light Detection technology with excitation and reference light sources to offer a wide detection range and extremely low detection limit. The sensor also integrates temperature and pressure sensors to perform compensation for the measurement of dissolved oxygen based on ambient environmental conditions.
The ST-772P offers an easily replaceable, front loading DO membrane cap that has been independently developed by Pyxis Lab® with a typical service life of up to 2 years. This unique DO membrane cap design incorporates a black microporous PTFE membrane material designed to provide extreme scratch resistance, extended life span and simple replacement. The flat front-end design of the ST-772P makes this platform less prone to contamination or fouling and is very easy to clean.
The sensor body is composed of CPVC and is well suited for aggressive industrial application use. The ST-772P (CPVC) should be utilized in a submersed fixed or floating application with the Pyxis submersion assembly options. The ST-772 series offers both 4-20mA and RS-485 Modbus outputs and is Bluetooth® enabled when used in conjunction with the MA-CR Bluetooth Adapter.
Features
Typical Applications
Specifications
| Item | ST-772-P |
| P/N | 53720 |
| Body Material | CPVC |
| Installation Method | Submerged Installation |
| 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) | 296 x33.6 mm (11.65x 1.32 inches) |
| Weight | 760 g (1.67 lb) cable excluded |
| Working Pressure | 145 psi |
| Wet Material | CPVC/Titanium |
| Cables Provided | 4.9ft/1.5m Flying Lead Cable – 8Pin 30ft/10m Bulkhead Cable – 8Pin |
| 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 |
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