
Specs at a glance
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Measuring range
Standard sensor: 0 to 60 mg/l, 0 to 600 %SAT, 0 to 1200 hPa, 0 to 100 Vol%
Trace sensor: 0 to 10 mg/l, 0 to 120 %SAT, 0 to 250 hPa, 0 to 25 Vol% -
Process temperature
-5 to 135 °C (23 to 275 °F)
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Process pressure
1 to 12 bar abs (14.5 to 174 psi)
Field of application
Memosens COS22E is fully compliant to FDA and USP and thus suitable for hygienic and sterile applications. The sensor is low-maintenance and ensures long-term stability - even with frequent sterilization. Its trace version safeguards your products, process and plant equipment from oxygen influences. Thanks to Memosens 2.0 digital technology, COS22E offers extended storage of calibration and process data providing the perfect basis for predictive maintenance and efficient operation.
Oxymax COS22E measures oxygen in the core processes of many industries:
Life sciences and biotechnology: Process control in fermentation
Food & Beverages
Water treatment: Boiler feedwater
Inertizations
Residual oxygen measurement in processes
With its international explosion-protection approvals, the digital sensor is suitable for hazardous area use.
Benefits
Low maintenance: The modular sensor design enables fast exchange of membrane cap and electrolyte.
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Full compliance with all relevant regulations for hygienic processes ensures the safety of your product.
High accuracy of the measuring principle enables precise measurement resulting in best product quality.
The sensor is suitable for application in hazardous areas.
IIoT ready: Memosens 2.0 offers extended storage of calibration and process data, enabling better trend identification and providing a future-proof basis for predictive maintenance and enhanced IIoT services.
Increased plant availability: Memosens technology and Liquiline transmitters enable plug & play for fast commissioning and sensor exchange.
Videos
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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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Memosens converts the measured value to a digital signal and transfers it to the transmitter without a contacting connection. This video shows how Memosens optimizes process control and maintenance.
Extended selection
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High-end products
- Highly functional and convenient
Technical excellence
Simplicity

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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
FLEX selections | Technical excellence | Simplicity |
---|---|---|
Fundamental selection Meet your basic measurement needs |
Technical excellence
|
Simplicity
|
Lean selection Handle your core processes easily |
Technical excellence
|
Simplicity
|
Extended selection Optimize your processes with innovative technologies |
Technical excellence
|
Simplicity
|
Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
Predecessor
Success stories
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Measuring principle
Amperometric oxygen measurement
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Application
Typical applications are:
- Pharmaceuticals and biotechnology: process control in enzyme production, control of culture preparations
.
- Water treatment: boiler feed water, WFI (Water for Injection)
- Residual oxygen measurement in processes -
Installation
Installation
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Characteristic
Digital hygienic amperometric oxygen sensor
with maximum measurement stability over several
sterilization cycles available in two measuring ranges -
Measuring range
Standard sensor: 0 to 60 mg/l, 0 to 600 %SAT, 0 to 1200 hPa, 0 to 100 Vol%
Trace sensor: 0 to 10 mg/l, 0 to 120 %SAT, 0 to 250 hPa, 0 to 25 Vol% -
Measuring principle
Measuring principle
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Design
Design
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Material
Sensor shaft: Stainless steel 1.4435 (AISI 316L)
Process seal: FKM (USP<87>, <88> Class VI and FDA)
Process seal for Ex versions: FKM (not FDA compliant)
Seals/O-rings: EPDM (USP<87>, <88> Class VI and FDA), FKM
(FDA)
Shaft sleeve: Stainless steel 1.4435 (AISI 316L) or
Titanium or Hastelloy
Membrane cover layer: Silicone (USP<87>, <88> Class VI and FDA) -
Dimension
Diameter: 12 mm (0.47 inch)
Shaft length: 120, 160, 220, 320, 420 mm
(4.72, 6.30, 8.66, 12.60 und 16.54 inch) -
Process temperature
-5 to 135 °C (23 to 275 °F)
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Process pressure
1 to 12 bar abs (14.5 to 174 psi)
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Temperature sensor
NTC 22k
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Connection
Inductive, contactless connection head with Memosens 2.0 technology
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Ingress protection
IP68
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Additional certifications
Additional certifications
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Technical Information (TI)
Memosens COS22E
English version - 02/2022
New version available in English
Hygienic amperometric oxygen sensor with maximum measurement stability over multiple sterilization cycles
EN 08/02/202207/10/2021Language:
English
Version:
08/02/2022
File size:
839.8 KB
File name:
TI01619CEN_0222-00.pdf
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Operating Instruction (BA)
Memosens COS22E
English version - 02/2022
New version available in English
Amperometric oxygen sensor with Memosens 2.0 technology
EN 08/02/202207/10/2021Language:
English
Version:
08/02/2022
File size:
2 MB
File name:
BA02145CEN_0222-00.pdf
-
-
-
Technical Information (TI)
Memosens COS22E
-
Technical Information (TI)
English version - 02/2022Hygienic amperometric oxygen sensor with maximum measurement stability
over multiple sterilization cyclesEN 08/02/202207/10/2021Language:
English
Version:
08/02/2022
File size:
839.8 KB
File name:
TI01619CEN_0222-00.pdf
-
-
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Operating Instruction (BA)
Memosens COS22E
-
Operating Instruction (BA)
English version - 02/2022Amperometric oxygen sensor with Memosens 2.0 technology
EN 08/02/202207/10/2021Language:
English
Version:
08/02/2022
File size:
2 MB
File name:
BA02145CEN_0222-00.pdf
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-
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Short Instruction (KA)
Memosens COS22E
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Short Instruction (KA)
English version - 10/2021Amperometric oxygen sensor with Memosens 2.0 technology
EN 07/10/2021Language:
English
Version:
07/10/2021
File size:
568.5 KB
File name:
KA01541CEN_0121.pdf
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Installation Instructions (EA)
EA Kit COV22
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Installation Instructions (EA)
English version - 02/2025For the maintenance of oxygen sensors COS22/COS22D/COS22E
EN 17/02/202503/05/202429/09/2022Language:
English
Version:
17/02/2025
File size:
929.5 KB
File name:
EA01437CEN_0325-00.pdf
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Ex Safety Instruction (XA)
Memosens COS22E Memosens COS51E
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Ex Safety Instruction (XA)
English version - 05/2022EAC Ex 0Ex ia IIC T6 … T4 Ga X
Safety instructions for electrical apparatus in explosion-hazardous
areasEN 11/05/2022Language:
English
Version:
11/05/2022
File size:
420.1 KB
File name:
XA02840CEN_0121-00.pdf
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Ex Safety Instruction (XA)
Memosens COS22E Memosens COS51E
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Ex Safety Instruction (XA)
English version - 11/2021Supplement to BA02145C
Supplement to BA02146C
Safety instructions for electrical apparatus in explosion-hazardous
areasEN 17/11/2021Language:
English
Version:
17/11/2021
File size:
504.9 KB
File name:
XA02752CEN_0121-00.pdf
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-
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Ex Safety Instruction (XA)
Memosens oxygen sensors
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Ex Safety Instruction (XA)
English version - 03/2023NEPSI Ex ia IIC T6/ T4 Ga
Safety instructions for electrical apparatus in explosion-hazardous
areasEN 15/03/2023Language:
English
Version:
15/03/2023
File size:
591.3 KB
File name:
XA03110CEN_0123-00.pdf
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-
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Ex Safety Instruction (XA)
XA Memosens COS22E Memosens COS51E
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Ex Safety Instruction (XA)
English version - 01/2025Supplement to BA02145C
Supplement to BA02146C
Safety instructions for electrical apparatus in explosion-hazardous areasEN 14/01/2025Language:
English
Version:
14/01/2025
File size:
501.7 KB
File name:
XA03502CEN_0124-00.pdf
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-
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Ex Safety Instruction (XA)
Memosens COS22E Memosens COS51E
-
Ex Safety Instruction (XA)
English version - 03/2022KOR Ex ia IIC T6… T4 Ga
Safety instructions for electrical apparatus in explosion-hazardous
areasEN 18/03/2022Language:
English
Version:
18/03/2022
File size:
420.2 KB
File name:
XA02791CEN_0121-00.pdf
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Ex Safety Instruction (XA)
Memosens oxygen sensors
-
Ex Safety Instruction (XA)
English version - 01/2023IS Class I Div 1 Groups A, B, C, D
Ex ia IIC T6... T4 Ga
Class I Zone 0 AEx ia IIC T6... T4 Ga
Safety instructions for electrical apparatus in explosion-hazardous
areasEN 12/01/2023Language:
English
Version:
12/01/2023
File size:
499.7 KB
File name:
XA03088CEN_0122-00.pdf
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