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Digital oxygen sensor
Oxymax COS22D

Memosens amperometric oxygen sensor for standard, hygienic and sterile applications

  • ©Endress+Hauser
  • ©Endress+Hauser
  • 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.

The Oxymax COS22D safeguards your products, process and plant equipment from oxygen influences. It measures reliably over a wide range helping you to better monitor and control your applications. The sensor is low-maintenance and ensures long-term stability - even with frequent sterilization and autoclaving. Thanks to Memosens digital technology, COS22D combines maximum process and data integrity with simple operation. It enables lab calibration and facilitates predictive maintenance.


  • Reliable, long-term stability and linear measurement

  • Low-maintenance design

  • Suitable for CIP/SIP and autoclaving

  • Unique hygienic design (EHEDG)

  • USP class VI

  • Approved for hazardous area use

Field of application

Oxymax COS22D measures oxygen in the core processes of many industries:

  • Pharma and biotechnology
    – Process control in enzyme production
    – Control of culture growth

  • Food & Beverages

  • Chemicals

  • Water treatment
    – Boiler feedwater
    – WFI (water for injection)

  • Inertizations

  • Residual oxygen measurement in processes

With its international explosion-protection approvals, such as ATEX, FM, CSA and NEPSI, the digital sensor is suitable for hazardous area use.

Features and specifications

Documents / Manuals / Software

Accessories / Spare parts

Predecessor / Successor

Predecessor: Oxymax COS21D, Oxymax W COS71

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