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P91 Dissolved Oxygen Probe

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P91 Dissolved Oxygen Probe

The sensor consist of a probe to which is fitted a cartridge that contains a precisely stretched permeable membrane, electrodes and electrolyte (p/n P91D). The inexpensive cartridge will provide continuous service for 6 to 12 months and is the easily replaced in minutes. The cartridge is supplied hermetically sealed for longer shelf life. Featured in the system are optional mounting hardware assemblies that provide universal sensor mounting for all aeration basins. The unique flotation mounting assembly is fully adjustable for sensor placement (p/n MHBF). Its flotation ball design minimizes membrane fouling as the surface of the membrane is continuously scrubbed by wave action in the basin. For clean water applications where wave action scrubbing is not required, an economical fixed submersion mounting assembly is available (p/n MHDS).

Technical Data

  • Measuring Range
    D.O. 0 - 20.00 ppm or 0 - 250% saturation
    Temperature 0 to 40°C (32 to 104°F)

  • Temperature Range
    0 to 40°C (32 to 104°F)

  • Wetted Materials
    CPVC and Teflon F.E.P. membrane

  • Transmission Distance
    2000 ft (609 m)

  • Cable
    25 ft. (7.6 m), 6 conductors plus shield

  • Replacement Cartridge
    Part No. P91D (Hermetically sealed)


  • Supports up to a 12-foot boom

  • Replaceable sensor

  • Ball float minimizes membrane fouling

Data Sheet
Submersion Mounting Hardware
Floatation Mounting Hardware
Flow Thru Mounting Hardware



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Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


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