Endress and Hauser O2 Sensor, COS41

Amperometric oxygen sensor for water, wastewater and utilities
SKU: COS41 Category:

Oxymax COS41 is a reliable and accurate oxygen sensor for all kinds of water & wastewater applications. Designed for reduced maintenance and a long operating life, the sensor offers real value for money.


  • High measurement accuracy
  • Long maintenance intervals
  • Minimum calibration effort thanks to simple air calibration


Oxymax COS41 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 protection, etc.)
    – Water quality monitoring in rivers, lakes or seas
  • Utilities of all industries:
    – O2 control in the biological treatment
    – Process water treatment and monitoring
  • Fish farming:
    – O2 control for optimum growth conditions


Measuring Principle Sensor Oxygen
Application Aeration tank, river monitoring, water treatment, fish farming.
Characteristic Amperometric 2-electrode system to measure dissolved oxygen.
Measurement range 0,05 – 20mg/l
Measuring principle Closed (membrane covered) amperometric 2-electrode sensor.
Design – Extreme stable membrane- Analog communication
Material Sensor body : POMMembrane cap : POM
Dimension Diameter : 40mm
(1.56inch)Length : 220mm
Process temperature max. 50°C
Process pressure max. 10bar
temperature sensor Integrated NTC-sensor
Connection Process connection : G1″Cable : Fixed cable or TOP68 connector

Endress + Hausers