A Digital Oxygen Sensor for Spot and Laboratory Measurement

The COL37E is designed for applications where dissolved oxygen needs to be checked from individual samples rather than continuously monitored in a process line.

Its compact design makes it suitable for laboratory measurements, grab samples and field spot checks, providing a convenient way to obtain oxygen measurements away from a permanently installed process sensor.

Optical Measurement Principle

The COL37E uses an optical measuring principle for dissolved oxygen measurement. Compared with conventional electrochemical oxygen sensors, optical oxygen measurement does not rely on a conventional electrolyte-based measuring cell.

This makes the sensor well suited to applications where simple handling and repeatable spot measurements are important.

Memosens 2.0 Digital Technology

A major feature of the COL37E is its Memosens 2.0 digital connection. The sensor uses an inductive connection head, allowing measurement data and sensor information to be transferred digitally to a compatible Memosens transmitter or portable measuring device.

Memosens technology also supports sensor-specific data management, helping make calibration and measurement history easier to manage.

Designed for Grab Samples and Field Measurements

The COL37E is particularly useful when samples are taken from different points and analyzed individually.

Instead of installing a permanent oxygen measurement point, users can use the sensor to perform measurements directly on collected samples or at selected locations in the field.

This makes it suitable for laboratory verification, process checks and mobile water-quality measurements.

Compact 12 mm Sensor Shaft

The sensor has a 12 mm diameter stainless-steel shaft with a 120 mm shaft length, providing a compact form factor for laboratory containers, sample vessels and field measurement applications.

Its relatively small dimensions make it easier to handle when working with individual samples.

Integrated Temperature Measurement

The COL37E includes an integrated Pt1000 temperature sensor. Temperature information is important for dissolved oxygen measurement, and the integrated temperature element allows temperature to be measured together with oxygen.

Wide Oxygen Measuring Range

The official product information specifies a dissolved oxygen measuring range of 0 to 330 %SAT.

This range allows the sensor to be used for a variety of oxygen measurement and verification tasks rather than being limited to a narrow concentration window.

IP68 Protection

The COL37E has an IP68 ingress protection rating, supporting its use in laboratory and field environments where the sensor may be exposed to water during normal measurement handling.

Not Designed for Continuous Process Measurement

An important point when selecting the COL37E is that Endress+Hauser specifies it for laboratory measurements and random/spot sampling, and the product information states that it is not intended for continuous measurement in the process.

For permanent dissolved oxygen monitoring, a dedicated in-process oxygen sensor and suitable assembly should be selected instead.

Key Features

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  Digital optical dissolved oxygen sensor
  
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  Designed for laboratory and spot measurements
  
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  Suitable for grab-sample and field measurements
  
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  Memosens 2.0 digital technology
  
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  Inductive digital connection head
  
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  Measuring range 0 to 330 %SAT
  
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  Integrated Pt1000 temperature sensor
  
• 
  Stainless-steel sensor shaft
  
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  12 mm diameter
  
• 
  120 mm shaft length
  
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  IP68 ingress protection
  
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  Compact design for mobile and laboratory use
  
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  Designed for use with compatible Memosens measuring systems
  
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  Not intended for continuous in-process measurement
  

Typical Applications

Laboratory Oxygen Measurement

The COL37E can be used for dissolved oxygen measurements in laboratory environments where samples are analyzed individually.

Grab-Sample Analysis

For plants that periodically collect water or process samples, the sensor can provide a convenient way to check dissolved oxygen without installing a permanent sensor at every sampling point.

Field Spot Measurements

The compact Memosens sensor is suitable for field measurements where oxygen concentration needs to be checked at different locations.

Water Quality Checks

The COL37E can be used for spot measurements during water-quality investigations and process verification.

Process Verification

The sensor can be used as a portable measurement tool to independently check dissolved oxygen values from an existing process measurement point.

Research and Testing

Its compact form and digital connection make the COL37E suitable for laboratory testing, experimental measurements and other applications where oxygen needs to be measured from individual samples.

FAQ

What is the Endress+Hauser Memosens COL37E?

The COL37E is a digital optical dissolved oxygen sensor designed for laboratory measurements and random or spot measurements in the field.

Is the COL37E a Memosens sensor?

Yes. The COL37E uses Memosens 2.0 technology with an inductive digital connection head.

Is the COL37E an optical oxygen sensor?

Yes. It is an optical dissolved oxygen sensor intended for laboratory and spot measurements.

What is the measuring range of the COL37E?

The official measuring range is 0 to 330 %SAT.

Does the COL37E measure temperature?

Yes. The sensor includes an integrated Pt1000 temperature sensor.

Can the COL37E be installed permanently in a process?

No. Endress+Hauser specifies the COL37E for laboratory measurements and random/spot sampling, and states that it is not intended for continuous process measurement.

What is the diameter of the COL37E?

The sensor has a 12 mm diameter and a 120 mm shaft length.

What is the protection rating of the COL37E?

The COL37E has an IP68 ingress protection rating.

What is the difference between COL37E and a fixed dissolved oxygen sensor?

The main difference is the intended application. The COL37E is designed for laboratory and spot measurements, while fixed dissolved oxygen sensors are designed to remain installed at a process measuring point for continuous monitoring.

What is the difference between COL37E and COA451?

The COL37E is the oxygen sensor, while the COA451 is a retractable assembly used to install and maintain compatible 40 mm oxygen sensors. They are different types of products and should not be placed in the same product category.