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Dissolved oxygen sensor
Oxymax COS61

Dissolved oxygen sensor Oxymax COS61 ©Endress+Hauser
Dissolved oxygen sensor Oxymax COS61 ©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.

  • Dissolved oxygen sensor Oxymax COS61
  • Dissolved oxygen sensor Oxymax COS61

Optical oxygen sensor for water, wastewater and utilities

Oxymax COS61 is a high-performance oxygen sensor that offers fast, accurate and drift-free measurement. It supports your process with low maintenance, high availability and easy handling. The sensor's long-term stable fluorescence layer is exclusively oxygen-selective (interference-free), ensuring consistently reliable measurement.

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  • Specs at a glance

    • Measurement range

      0mg/l ... 20mg/l
      0%SAT ... 200%SAT
      0 ... 400hPa

    • Process temperature

      -5°C ... 60°C
      ( 23 - 140°F)

    • Process pressure

      max. 10bar
      (145psi)

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Additional components

  • Liquisys COM223 is a compact panel transmitter for dissolved oxygen measurement. Liquisys COM223 is a compact panel transmitter for dissolved oxygen measurement.

    Dissolved oxygen transmitter
    Liquisys COM223

    Compact panel device for water, wastewater, utilities and fish farming

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    from CHF 803.-
  • Liquisys COM253 is a compact field transmitter for dissolved oxygen measurement. Liquisys COM253 is a compact field transmitter for dissolved oxygen measurement.

    Dissolved oxygen transmitter
    Liquisys COM253

    Compact field device for water, wastewater, utilities and fish farming

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    Prices temporarily unavailable
    from CHF 803.-
  • COY8 is an oxygen-free gel for validation, calibration and adjustment of oxygen and chlorine sensors COY8 is an oxygen-free gel for validation, calibration and adjustment of oxygen and chlorine sensors

    Zero-point gel
    COY8

    Ready-to-use gel for validation, calibration, and adjustment of oxygen and disinfection sensors

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    Prices temporarily unavailable
    from CHF 803.-

  • Benefits

    • Minimum maintenance, maximum availability

    • Fast, drift-free measurement for aeration control and process monitoring

    • Long-term stability for increased process safety

    • High-performing in all aeration processes (SBR, Anamox, etc.)

    • Chemical-free: no electrolyte...

  • Field of application

    Oxymax COS61 measures the dissolved oxygen concentration in:

    • Wastewater treatment plants:
      - O2 control in the aeration basin
      - Process water treatment and monitoring

    • Water works:
      - Status monitoring of drinking water (oxygen enrichment, corrosion...

Features and specifications

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Details

  • Measuring principle

    Optical oxygen measurement

  • Application

    Aeration tank, river monitoring, water treatment, fish farming.

  • Characteristic

    Digital, optical (luminescence) dissolved oxygen measurement.
    No flow needed - measurement possible in still water.

  • Measurement range

    0mg/l ... 20mg/l
    0%SAT ... 200%SAT
    0 ... 400hPa

  • 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

    - Calibration data saved in sensor.
    High degree of EMC protection.

  • Material

    Sensor body : stainless steel 1.4571Membrane cap : POM

  • Dimension

    Diameter : 40mm
    (1.56inch)Length : 220mm
    (8.58inch)

  • Process temperature

    -5°C ... 60°C
    ( 23 - 140°F)

  • Process pressure

    max. 10bar
    (145psi)

  • Temperature sensor

    NTC temperature sensor, 0 to 50°C
    (32 - 122°F)

  • Connection

    Process connection: G1" thread
    Cable connection : fixed cable or TOP68 plug-in-head.

Documents / Manuals / Software

Accessories / Spare parts

Nr
Order code
Specification
  • 70
  • 80
  • 10
    • Nr 10 Order code 51506820

      Measuring cable COK31-1.5

      1.5 m of length, ready made for sensors COS31, COS61 and COS71 with TOP68 connector.

  • 20
    • Nr 20 Order code 51506821

      Measuring cable COK31-7

      7 m of length, ready made for sensors COS31, COS61 and COS71 with TOP68 connector.

  • 30
    • Nr 30 Order code 51506822

      Measuring cable COK31-15

      15 m of length, ready made for sensors COS31, COS61 and COS71 with TOP68 connector.

  • 60
  • 90
    • Order code 50081787

      COY 3-SK membrane protective basket

      for immersion of diss. oxygen sensors COS31/41/51D/61/61D in fish ponds.

    • Order code 51518599

      Calibration cap, COS31/41/61/51D/61D//71

  • 120
    • Nr 120 Order code 50001054

      Junction box VS

      with socket and plug, type SXP Protection class: IP65.

    • Order code 71495126

      Kit COSxx Protection cage 8,5 mm holes

    • Order code 71495128

      Kit COSxx Protection cage Standard

    • Order code 71495130

      Kit COSxx Protection cage Fish farming

    • 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

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  • Baltic Sea water used as cooling water in the power station Baltic Sea water used as cooling water in the power station

    Cooling water directly from the Baltic Sea

    With the CUS52D, power plant operator KNG benefits from reduced maintenance costs due to reliable, stable measurement even under harsh conditions in salt water.

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    Monitoring and control of a semi-batch polymerization with Raman spectroscopy

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    The automated phosphate monitoring with Liquiline System CA80PH helps the food company Pasfrost ensure the compliance with the strict limit values for its industrial wastewater.

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