The Pyxis ST-772 Series optical luminescent 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 blue/red light detection technology with excitation and reference light sources, offering a wide detection range and very low detection limit. The sensor also integrates temperature and pressure sensors, which can perform temperature and pressure compensation for the measurement of dissolved oxygen based on ambient environmental conditions present in the application of use.
The ST-772 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 two 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-772 makes this platform less prone to contamination or fouling and is very easy to clean. The sensor body is composed of 304 stainless steel (a CPVC version, ST-772-P, is also available) and is well suited for aggressive industrial application use. The ST-772 should be utilized in a submersed fixed or floating application with the Pyxis submersion assembly options. The ST-772T (304SS) and ST-772T-P (CPVC) models are available for inline or bypass flow installations. 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.
Product 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
Shipping
Promag Enviro provides free shipping throughout Canada and the U.S.
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