Name: Memosens COS81E
Brand: Endress+Hauser
Availability: InStock

Digital optical oxygen sensor Memosens COS81E

Memosens 2.0 hygienic sensor for the life sciences and food industries

Memosens COS81E: Digital optical oxygen sensor for the life sciences and food industries

Memosens COS81E: Digital optical sensor for dissolved oxygen - available in various shaft lengths

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.

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.

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Digital optical oxygen sensor Memosens COS81E

Memosens 2.0 hygienic sensor for the life sciences and food industries

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Benefits

Memosens COS81E is designed according to EHEDG and ASME BPE. It avoids cross-contamination and is fully compliant to USP class VI and FDA as well as all GMP and GLP requirements.
High process up-time: Precalibrate the sensor in your lab and then swap it into your process with plug & play. It does not need polarization time and is immediately ready to measure.
Reliable measurement: A built-in reference LED compensates the ageing of the measuring LED. This ensures precise measured values even after CIP/SIP and autoclaving.
Reduce your maintenance effort: Memosens COS81E does not have a difficult-to-handle electrolyte or sensitive membrane. Just exchange the sensor cap, perform a calibration and you are done.
The sensor can be used in process applications as well as benchtop fermenters. Providing you with 100% measuring consistency from the first lab trials to the final scaled-up process and your process lab.
Perfectly suited for inertization processes thanks to its approvals for hazardous and dust-explosive 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.

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Digital optical oxygen sensor Memosens COS81E

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Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

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Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

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Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

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Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

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Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

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My Endress+Hauser is your 24/7 connection to Endress+Hauser – in the office, in the field or on the go. It brings together transaction management, documentation and software downloads, knowledge base access, customer support, engineering tools and cloud‑based IIoT services helping you work easier, faster and more efficiently.

Technology

Memosens 2.0: Cutting-edge sensor technology reloaded

Make life easier, increase process safety and stay connected with Memosens 2.0 digital technology.

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Technology

Liquiline: cutting-edge transmitter platform

By choosing the Liquiline platform, you’re effectively choosing to spend less money on stock holding, save installation time and gain operational safety!

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Maintenance kit Memosens COV81

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Order code COV81-

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Zero-point gel COY8

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Order code COY8-

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Simplify liquid analysis with Memosens technology

Simplify liquid analysis with non-contact, digital Memosens technology: Benefit from safe data transmission, more process uptime and low maintenance.

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Memosens COS81E digital oxygen sensor

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Spare parts and accessories

further parts

Maintenance kit Memosens COV81

further parts

Order code COV81-

further parts

Zero-point gel COY8

further parts

Order code COY8-

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Selection of compatible products

1-channel transmitter Liquiline M CM42

Two-wire field device for hazardous and non-hazardous area use in chemicals, life sciences and food

1-/2-channel transmitter Liquiline CM442R

Compact multiparameter DIN-rail and cabinet device for all industries

Zero-point gel COY8

Ready-to-use gel for validation, calibration, and adjustment of oxygen and disinfection sensors

Multichannel transmitter Liquiline CM44P

Multiparameter device for process photometers and Memosens sensors

1-channel transmitter Liquiline Compact CM82

Multiparameter field device for hazardous and non-hazardous applications in all industries

Measuring range	0.004 to 30 mg/l 0.05 to 330 %SAT 0.1 to 700 hPa
Process temperature	0 to 60/80 °C (C-shape/U-shape) 32 to 140/175 °F (C-shape/U-shape) Sterilization: max. 140 °C at 6 bar for max. 45 min (Max. 284 °F at 87 psi for max. 45 min)
Process pressure	0.02 to 13 bar abs (0 to 190 psi)
Measuring principle	Optical oxygen measurement
Application	• Oxygen control in fermenters, e.g. in the pharmaceutical or biotechnology sectors • Monitoring of explosive atmospheres with an oxygen concentration of ≥ 2% Vol • Quality control in the food industry
Installation	Standard process connection Pg 13.5 Installation in standard pH assemblies possible
Characteristic	Hygienic, optical sensor for stable oxygen measurement over multiple sterilization cycles
Measuring principle	Principle of luminescence quenching
Design	Optical system, stainless steel
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, FFKM (USP<87>, <88> Class VI and FDA) Spot cap: Stainless steel 1.4435 (AISI 316L), titanium or hastelloy Spot layer: Silicone (USP<87>, <88> Class VI and FDA)
Dimension	Diameter: 12 mm (0.47 inch) Shaft length: 120, 160, 220, 320 and 420 mm (4.7 , 6.3 , 8.7 , 12.6 and 16.5 inch)
Temperature sensor	Pt1000
Ex certification	With ATEX, IECEx, NEPSI, Japan and INMETRO approvals for use in hazardous areas Zone 0, Zone 1 and Zone 2 and furthermore Zone 20, Zone 21 and Zone 22 in dust hazardous areas. With CSA C/US approval for use in hazardous areas Class I Division 1 and furthermore Class II Division 1 in dust hazardous areas.
Connection	Inductive, digital connection head with Memosens 2.0 technology
Ingress protection	IP68 IP69
Certificates, declarations and approvals	Inspection certificate 3.1, EN10204 Surface roughness test ISO4287/Ra (≤ 0,38 µm) Conformity to cGMP derived requirements ASME BPE US Food Contact Materials FDA CFR 21 EU Food Contact Materials (EG) 1935/2004 CN Food Contact Materials GB 4806 EHEDG EL Class I

Digital optical oxygen sensor Memosens COS81E

Digital optical oxygen sensor Memosens COS81E

Digital optical oxygen sensor Memosens COS81E

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Simplify liquid analysis with Memosens technology

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Digital optical oxygen sensor Memosens COS81E

Digital optical oxygen sensor Memosens COS81E

Digital optical oxygen sensor Memosens COS81E

Product information

Selection of compatible products

Spare parts and accessories

Related content

Simplify liquid analysis with Memosens technology

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

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Industries

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