Digital oxygen sensor
Oxymax COS51D

Digital oxygen sensor
Oxymax COS51D ©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 amperometric oxygen sensor for water, wastewater and utilities

Oxymax COS51D is a reliable and highly accurate oxygen sensor for all kinds of water & wastewater applications (including hazardous areas). Designed to be low-maintenance with a long operating life, the sensor offers outstanding value for money. Thanks to Memosens digital technology, the Oxymax COS51D combines maximum process and data integrity with simple operation. It resists corrosion and moisture, enables lab calibration and facilitates predictive maintenance.

Snelle selectie

Kies uit één van de voorgestelde opties
  • <%label%>
  • <%feature%>
  • Process Connection
  • <%message%>


Individuele configuratie

Ga verder met uw keuze uit alle mogelijke opties
  • Voordelen

    • Maximum measurement accuracy

    • Logging of sensor load data for easy traceability

    • Intelligent, self-monitoring sensor

    • Minimum calibration effort thanks to simple air calibration

    • Long maintenance intervals

    • Approved for hazardous area use

  • Toepassingsgebied

    Oxymax COS51D 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...

Kenmerken en specificaties



  • Meetprincipe

    Sensor Oxygen

  • Application

    Aeration tank, river monitoring, water treatment, fish farming, sewage treatment plants

  • Characteristic

    Amperometric 3-electrode longterm-stable sensor to measure dissolved oxygen

  • Measurement range

    0.01 to 100 mg/l
    0.00 to 1000 %SAT
    0 to 2000 hPa

  • Measuring principle

    Closed membrane covered amperometric 3-electrode system

  • Design

    Digital signal transmission
    Calibration datas stored in the sensor

  • Material

    Sensor body: POM
    Membrane cap: POM

  • Dimension

    Diameter: 40mm (1.57 inch)
    Shaft length: 144 mm (5.67 inch)

  • Process temperature

    -5 to 50 °C
    (20 to 120 °F)

  • Process pressure

    max. 10 bar
    (max. 145 psi)

  • Connection

    Memosens connector
    Process: G1, NPT 3/4"

Documenten / handleidingen / software

Accessoires / Spare parts

Order code
  • 2
  • 1
    • Order code 51506973

      Polijst folie COY31-PF

      6 stuks om de goud kathode te reinigen van de sensoren COS31, COS41 en COS71.

    • Order code 51506784

      COS31/41 accesoires kit

      Inhoud: COY3-F, COY31-WP, COY31-OR en COY31-PF voor de sensoren COS31 en COS41

    • Order code 51506785

      Accessoire kit COY31-S-Z

      Inhoud: COY3-F, COY31S-WP, COY31-OR en COY31PF voor de sensoren COS31 en COS71.

  • 3
    • Order code 51500832

      Verbindingsdoos RM

      Verbindingsdoos t.b.v. een verlengkabel voor Memosens/CUS31/41. Inclusief klemmen, en 2xPG 13.5, beschermingsklasse IP65

    • Order code 50081787

      COY3-SK membraam beschermingsplaat

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

    • Order code CYK10-

      Meetkabel CYK10 Memosens

      Toepassing: Digitale sensoren met inductieve Memosens connector. Temperatuurbereik: max. -20...135°C

    • Order code CYK11-

      Verlengkabel CYK11 Memosens

      Memosens Verlengkabel Toepassing: tbv digitale sensoren met of zonder vaste kabel (CYK10) Temperatuur: -30...90°C

    • Order code COY8-

      Zero-point gel COY8

      Nulpunt: Verificatie, kalibratie, afstelling, afstelling op het nulpunt van zuurstof en desinfectiesensoren ::Amperometrische en optische sensoren ::12, 25 en 40mm diameter ::Toepassing in het labo, in het veld