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Digital optical oxygen sensor
Memosens COS81E

Memosens COS81E: Digital optical oxygen sensor for the life sciences and food industries ©Endress+Hauser
Memosens COS81E: Digital optical sensor for dissolved oxygen - available in various shaft lengths ©Endress+Hauser

The concentration of oxygen dissolved in a liquid can be measured using the amperometric or optical measuring principles. This video shows what it is about and how these measuring principles work.

Memosens converts the measured value to a digital signal and transfers it to the transmitter without a contacting connection. This video shows how Memosens optimizes process control and maintenance.

Memosens 2.0 hygienic sensor for the life sciences and food industries

Memosens COS81E is the ideal optical oxygen sensor for hygienic applications. Its well-tuned measuring system prevents ageing of the optical spot and offers precise, long-term stable measurements for high product quality. Thanks to its approvals for hazardous and dust-explosive areas, COS81E is perfectly suited for inertization applications. With Memosens 2.0 digital technology, COS81E offers extended data storage providing the perfect basis for predictive maintenance and efficient operation.

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  • Specs at a glance

    • Measurement range

      0.004 to 30 mg/l
      0.05 to 330 %SAT
      0.1 to 700 hPa

    • Process temperature

      1 to 140 °C
      (32 to 284 °F)

    • Process pressure

      0.02 to 13 bar abs
      (0 to 190 psi)

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  • Benefits

    • Memosens COS81E is designed according to EHEDG and ASME BPE. It avoids cross-contamination and is fully compliant to USP class VI and FDA as well as all GMP and GLP requirements.

    • High process up-time: Precalibrate the sensor in your lab and then swap it...

  • Field of application

    Memosens COS81E measures oxygen in applications with high demands to sterility and hygiene such as:

    • Fermentation

    • Drinking water production

    • Inertization

    With its international explosion protection approvals, such as ATEX and IECEx, the Memosens COS81E...

Features and specifications

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Details

  • Measuring principle

    Optical oxygen measurement

  • Application

    • Oxygen control in fermenters, e.g. in the pharmaceutical or biotechnology sectors

    • Monitoring of explosive atmospheres with an oxygen concentration of ≥ 2% Vol

    • Quality control in the food industry

  • Installation

    Standard process connection Pg 13.5
    Installation in standard pH assemblies possible

  • Characteristic

    Hygienic, optical sensor for stable oxygen measurement over multiple sterilization cycles

  • Measurement range

    0.004 to 30 mg/l
    0.05 to 330 %SAT
    0.1 to 700 hPa

  • Measuring principle

    Principle of luminescence quenching

  • Design

    Optical system, stainless steel

  • Material

    Sensor shaft: Stainless steel 1.4435 (AISI 316L)

    Process seal: FKM (USP<87>, <88> Class VI and FDA)

    Process seal for Ex versions: FKM (not FDA-compliant)

    Seals/O-rings: EPDM, FFKM (USP<87>, <88> Class VI and
    FDA)
    Spot cap: Stainless steel 1.4435 (AISI 316L), titanium or hastelloy

    Spot layer: Silicone (USP<87>, <88> Class VI and FDA)

  • Dimension

    Diameter: 12 mm (0.47 inch)
    Shaft length: 120, 160, 220, 320 and 420 mm
    (4.7 , 6.3 , 8.7 , 12.6 and 16.5 inch)

  • Process temperature

    1 to 140 °C
    (32 to 284 °F)

  • Process pressure

    0.02 to 13 bar abs
    (0 to 190 psi)

  • Temperature sensor

    Pt1000

  • Ex certification

    With ATEX, IECEx, NEPSI, Japan and INMETRO approvals for use in
    hazardous areas Zone 0, Zone 1 and Zone 2 and furthermore Zone 20, Zone 21 and Zone 22 in dust hazardous areas.
    With CSA C/US approval for use in
    hazardous areas Class I Division 1 and furthermore Class II Division 1 in dust hazardous areas.

  • Connection

    Inductive, digital connection head with Memosens 2.0 technology

  • Ingres protection

    IP68
    IP69

  • Additional certifications

    Additional certifications

Documents / Manuals / Software

Accessories / Spare parts

Nr
Order code
Specification
    • Order code COV81-

      Maintenance kit Memosens COV81

      service kit for Memosens COS81D contains optical cap, o-rings and further material for maintenance of COS81D

    • Order code COY8-

      Zero-point gel COY8

      Zero point: Verification, calibration, adjustment at zero point of oxygen and disinfection sensors ::Amperometric and optical sensors ::12, 25 and 40mm diameter ::Application in the lab, in the field

    • Order code CYK11-

      Measuring cable CYK11 Memosens

      Extension cable, Application: digital fixed cable sensors respectively CYK10. Operating temperature range: -30...90oC