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Zero-point gel COY8

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

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Zero-point gel COY8

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

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Benefits

  • Be sure: exact determination of the true zero of your oxygen and disinfection / chlorine measuring points.
  • Enhance your product quality: the zero-point calibration improves the accuracy and reliability of your measurements and can increase the quality and yield of your products.
  • Speed up your maintenance: the gel is instantly ready to use – just insert the sensor!
  • Simplify your maintenance: one tool for validation, calibration and adjustment of all your sensors in the field and the lab.
  • Improve safety at work: the ready-made gel comes in safe, easy-to-use bottles removing the need for manual chemical preparation by plant personnel.
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.

Learn more

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.

Services by your side

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.

Learn more

24/7 customer portal

Personalized transaction space

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.

Easy access to technical documentation

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.

My Endress+Hauser – all in one place

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.

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Product information

COY8 is an oxygen-free gel for validation, calibration and adjustment of oxygen and chlorine sensors
Zero-point gel
Specifications
Oxygen
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Description

COY8 is a ready-made gel that allows you to detect the true zero point of your oxygen and disinfection (e.g. free chlorine) sensors. This improves the reliability and accuracy of your measuring points leading to increased product quality and yield. What’s more, it helps you decide whether a sensor should be adjusted, maintained or replaced. The gel doesn't require additional chemicals or preparation. It is instantly ready to use and is reusable within 24 hours after opening.

Field of application

COY8 zero-point gel determines the true zero point of virtually all sensors that measure the parameters:

  • Oxygen
  • Free chlorine
  • Total chlorine
  • Chlorine dioxide
  • Etc.

It is used for example in:

  • Life Sciences - Fermentation processes
  • Food & Beverages - Inertization processes
  • Power & Energy - Steam/water cycle
  • Drinking water - Distribution network - Critical control points (CCPs)
  • Utilities of all industries - Water treatment
Benefits
  • Be sure: exact determination of the true zero of your oxygen and disinfection / chlorine measuring points.
  • Enhance your product quality: the zero-point calibration improves the accuracy and reliability of your measurements and can increase the quality and yield of your products.
  • Speed up your maintenance: the gel is instantly ready to use – just insert the sensor!
  • Simplify your maintenance: one tool for validation, calibration and adjustment of all your sensors in the field and the lab.
  • Improve safety at work: the ready-made gel comes in safe, easy-to-use bottles removing the need for manual chemical preparation by plant personnel.
Downloads
Most downloaded
Special Documentation (SD)
COY8 Use of the zero-point gel Special Documentation Use of the zero-point gel
English version - 04/2019
Download
Technical Information (TI)
Zero-point gel COY8 Technical Information For reliable verification, calibration and adjustment of the zero point
of oxygen sensors
English version - 06/2015
Download
Competence Brochure (CP)
良質な水のために 上水道、配水網、地表水、工業プラント向けの斬新なアイデア
Japanese version - 05/2025
Download
The CAD Drawings will be available after the configuration.
All downloads
106 Downloads
Technical Information (TI)
Most downloaded
Zero-point gel COY8 Technical Information For reliable verification, calibration and adjustment of the zero point
of oxygen sensors
English version - 06/2015
Download
Special Documentation (SD)
Most downloaded
COY8 Use of the zero-point gel Special Documentation Use of the zero-point gel
English version - 04/2019
Download
Competence Brochure (CP)
良質な水のために 上水道、配水網、地表水、工業プラント向けの斬新なアイデア
Japanese version - 05/2025
Download
Competence Brochure (CP)
Aus Freude an gutem Wasser Frische Ideen für Wasserwerke, Verteilernetze, Oberflächenwasser und
Industrieanlagen
German version - 07/2023
Download
Competence Brochure (CP)
For the love of quality water Fresh ideas for waterworks, distribution networks, surface waters and
industrial plants.
English version - 07/2023
Download
Buffer/calibration solution
COY8-AAxxxx (Slovakia) zero-point gel for oxygen sensors
01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (Mexico) zero-point gel for oxygen sensors
Spanish version - 01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (Malta) zero-point gel for oxygen sensors
English version - 01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (Lithuania) zero-point gel for oxygen sensors
01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (India) zero-point gel for oxygen sensors
English version - 01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (New Zealand) zero-point gel for oxygen sensors
English version - 01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (Spain) zero-point gel for oxygen sensors
Spanish version - 01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (European Union) zero-point gel for oxygen sensors
English version - 01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (Croatia) zero-point gel for oxygen sensors
Croatian version - 01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (Bulgaria) zero-point gel for oxygen sensors
01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (United Arab Emirates) zero-point gel for oxygen sensors
01/2025
Download
Buffer/calibration solution
COY8-AAxxxx (Japan) zero-point gel for oxygen sensors
Japanese version - 01/2025
Download
Buffer/calibration solution
COY8-AACxxx (Switzerland (Italian)) zero point gel for disinfection sensors
Italian version - 11/2024
Download
Buffer/calibration solution
COY8-AACxxx (Switzerland) zero point gel for disinfection sensors
German version - 11/2024
Download
Buffer/calibration solution
COY8-AACxxx (Australia) zero point gel for disinfection sensors
English version - 11/2024
Download
Buffer/calibration solution
COY8-AACxxx (Norway) zero point gel for disinfection sensors
Norwegian version - 11/2024
Download
Buffer/calibration solution
COY8-AACxxx (Ireland) zero point gel for disinfection sensors
English version - 11/2024
Download
Buffer/calibration solution
COY8-AACxxx (Lithuania) zero point gel for disinfection sensors
11/2024
Download
Buffer/calibration solution
COY8-AACxxx (Russia) zero point gel for disinfection sensors
Russian version - 11/2024
Download

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Zero-point gel

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Zero-point gel
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