Reliable oxygen sensor for water & wastewater

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Specs at a glance

Measurement range

0,05 - 20mg/l
Process temperature

max. 50°C
(122°F)
Process pressure

max. 10bar
(145psi)

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Field of application

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.

Oxymax COS41 measures the dissolved oxygen concentration in:

Wastewater treatment plants:
- O₂control 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

Benefits

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

Videos

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.

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Predecessor

COS4

COS4HD

Success stories

Drinking water analysis panel at Grand Belfort in France

Monitoring of all relevant parameters for drinking water with the drinking water analysis panel
Read the full story
The all-round carefree panel

Water Analysis Panels make continuous monitoring of drinking water easy at the water treatment plant in Frasnacht, Switzerland.
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Compliance made easy

The automated phosphate monitoring with Liquiline System CA80PH helps the food company Pasfrost ensure the compliance with the strict limit values for its industrial wastewater.
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Conductivity measurement in a water reuse plant

Pasfrost relies on Memosens CLS82D for the conductivity measurements in its water reuse plant. The sensor provides precise measurements even of very low conductivity values.
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On the trail of orthophosphate

White Paper on Orthophosphate Measurement in Municipal Sewage Treatment Plants
Read the full story

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FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

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Oxygen

Measuring principle

Amperometric oxygen measurement
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
(8.85inch)
Process temperature

max. 50°C
(122°F)
Process pressure

max. 10bar
(145psi)
Temperature sensor

Integrated NTC-sensor
Connection

Process connection : G1"Cable : Fixed cable or TOP68 connector

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further parts
Accessory kit COY31-Z

further parts

Order code

51506784
further parts
Elektrolyte COY3-F

further parts

Order code

50053349
Measuring chamber
Set of 2x membrane cap COY31-WP

Measuring chamber

Drawing number

Order code

2

51506976
Sealing
Sealing set COY31-OR

Sealing

Drawing number

Order code

1

51506985
further parts
Polishing foil COY31-PF

further parts

Order code

51506973
further parts
Measuring cable COK41-7

further parts

Order code

51506817
further parts
Measuring cable COK41-15

further parts

Order code

51506818
further parts
Kit COSxx Protection cage 8,5 mm holes

further parts

Order code

71495126
further parts
Kit COSxx Protection cage Standard

further parts

Order code

71495128
further parts
Kit COSxx Protection cage Fish farming

further parts

Order code

71495130
Housing/housing accessories
Protective cage for COS31/41/51D/61/71

Housing/housing accessories

Drawing number

Order code

3

50053276
further parts
Oxymax W COS41

further parts

Order code

COS41-
further parts
Zero-point gel COY8

further parts

Order code

COY8-

Junction box VBM

Order code

50003987
COY 3-SK membrane protective basket

Order code

50081787

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Often bought together

Accessories

Junction box VBM

COY 3-SK membrane protective basket

See more accessories

Dissolved oxygen sensorOxymax COS41

Specs at a glance

Measurement range

Process temperature

Process pressure

Field of application

Benefits

Videos

Predecessor

Success stories

Drinking water analysis panel at Grand Belfort in France

The all-round carefree panel

Compliance made easy

Conductivity measurement in a water reuse plant

On the trail of orthophosphate

Measuring principle

Application

Characteristic

Measurement range

Measuring principle

Design

Material

Dimension

Process temperature

Process pressure

Temperature sensor

Connection

Accessory kit COY31-Z

Elektrolyte COY3-F

Set of 2x membrane cap COY31-WP

Sealing set COY31-OR

Polishing foil COY31-PF

Measuring cable COK41-7

Measuring cable COK41-15

Kit COSxx Protection cage 8,5 mm holes

Kit COSxx Protection cage Standard

Kit COSxx Protection cage Fish farming

Protective cage for COS31/41/51D/61/71

Oxymax W COS41

Zero-point gel COY8

Junction box VBM

COY 3-SK membrane protective basket

Dissolved oxygen transmitterLiquisys COM223

Input

Output / communication

Dissolved oxygen transmitter Liquisys COM253

Input

Output / communication

Zero-point gelCOY8

Choose from our suggested options

Individual configuration

Often bought together

Dissolved oxygen sensor
Oxymax COS41

Dissolved oxygen transmitter
Liquisys COM223

Dissolved oxygen transmitter
Liquisys COM253

Zero-point gel
COY8