Oxymax COS51D - Digital Oxygen Sensor




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.




  • 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



Field of application

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 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

The sensor is suitable for hazardous area use (ATEX, FM, CSA).


Features and specifications

Measuring Principle Sensor Oxygen
Application Aeration tank, river monitoring, water treatment, fish farming.
Characteristic Amperometric 3-electrode sensor to measure dissolved oxygen.
Measurement range 0,01 - 100mg/l
Measuring principle Closed membrane covered amperometric 3-electrode system.
Design digital signal transmission 
Storage of the calibration datas in the sensor.
Material Sensor body : POM 
Membrane cap : POM
Dimension Diameter : 40mm 
(1.56inch)Length : 220mm 
Process temperature max. 50°C 
Process pressure max. 10bar 
Connection - Memosens connector- Process : G1" , NPT3/4