Reliable Digital Dissolved Oxygen Measurement

The Endress+Hauser COS51E is an amperometric digital oxygen sensor designed for continuous dissolved oxygen measurement in water and wastewater processes.

Using a proven amperometric measuring principle, the sensor provides stable and accurate oxygen measurement for applications where reliable process control is required.

The COS51E combines durable sensor technology with Memosens 2.0 digital communication, enabling efficient calibration management and simplified maintenance.

Designed for Water and Wastewater Applications

The COS51E is optimized for demanding water-based applications, especially where dissolved oxygen monitoring is essential.

Typical applications include:

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  Wastewater treatment
  
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  Aeration control
  
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  Surface water monitoring
  
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  Aquaculture
  
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  Utility water systems
  

Amperometric Measuring Principle

Unlike optical oxygen sensors, the COS51E uses an electrochemical amperometric measuring principle.

The sensor measures dissolved oxygen through an electrochemical reaction between the oxygen molecules and the electrode system, providing reliable measurement performance in continuous operation.

Memosens 2.0 Digital Technology

With Memosens 2.0, the COS51E stores important sensor information directly in the sensor.

Benefits include:

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  Calibration data storage
  
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  Easy sensor replacement
  
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  Improved measurement reliability
  
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  Better maintenance planning
  
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  Reduced commissioning time
  

Robust Design for Long-Term Operation

The COS51E features a durable sensor construction designed for continuous operation in challenging water environments.

Its replaceable membrane cap and electrolyte system help simplify maintenance while extending sensor service life.

Key Features

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  Digital dissolved oxygen sensor
  
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  Amperometric measuring principle
  
• 
  Memosens 2.0 digital technology
  
• 
  Reliable oxygen measurement for water applications
  
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  Suitable for wastewater treatment and aeration control
  
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  Replaceable membrane cap design
  
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  Integrated temperature sensor
  
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  Fast response time
  
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  Easy calibration and maintenance
  
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  Suitable for continuous process monitoring
  

Typical Applications

Wastewater Treatment Plants

Used for dissolved oxygen control in biological treatment processes, especially for aeration optimization.

Aeration Control

Provides continuous oxygen measurement to help maintain efficient aeration processes and stable biological treatment conditions.

Surface Water Monitoring

Suitable for monitoring oxygen levels in rivers, lakes and other natural water systems.

Aquaculture

Used for monitoring dissolved oxygen levels to maintain suitable conditions for aquatic organisms.

FAQ

What is Endress+Hauser COS51E?

The COS51E is a digital amperometric dissolved oxygen sensor designed for continuous oxygen measurement in water and wastewater applications.

What does COS51E measure?

COS51E measures dissolved oxygen concentration in liquids.

What is the difference between COS51E and optical oxygen sensors?

COS51E uses an amperometric measuring principle, while optical sensors use fluorescence-based measurement technology. The suitable choice depends on application requirements.

Does COS51E use Memosens technology?

Yes. COS51E uses Memosens 2.0 digital technology for secure data transfer and simplified sensor management.

Where is COS51E commonly used?

It is mainly used in wastewater treatment, aeration control, surface water monitoring and aquaculture applications.