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Memosens COS81D is a hygienic oxygen sensor for the life sciences, pharma and food industries.

Digital oxygen sensor
Memosens COS81D

Memosens optical oxygen sensor for hygienic applications in Life Sciences, Pharma and Food

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  • Measuring principle

    Optical oxygen measurement

  • Application

    Process control in enzyme production, control of culture growth, biotechnology, food industry, general process applications

  • 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 possible in still water

  • Measurement range

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

  • Measuring principle

    Oxygen-sensitive molecules (marker) are integrated in an optical active layer (fluorescence layer). The fluorescence layer surface is in contact with the medium. The sensor optics are directed at the back of the fluorescence layer. The sensor optics transmit green light pulses to the fluorescence layer. The markers respond (fluoresce) with red light pulses. The duration and intensity of the response signals depend directly on the oxygen contents or partial pressure.

  • Design

    Optical System, stainless steel

  • Material

    Sensor shaft: stainless steel 1.4435
    Process seal: FKM (USP <87>, <88> Class VI and FDA)
    Seal/O-rings: EPDM, FFKM (USP <87>, <88> Class VI and FDA)

  • Dimension

    Diameter: 12 mm (0.47 inch)
    Shaft length: 120, 220, 360 and 420 mm
    (4.72, 8.66, 14.2 and 16.5 inch)

  • Process temperature

    0 to 140 °C
    (32 to 284 °F)

  • Process pressure

    0.02 to 13 bar abs
    (0 to 190 psi)

  • Temperature sensor

    Pt1000 (Class A according to DIN IEC 60751)

  • Connection

    Memosens-connection head

  • Additional certifications

    Material certification 3.1
    ASME BPE-2016
    Regulation (EC) No. 1935/2004