II Meeting of the CEN group dealing with gas sensors and pattern recognition for odorant monitoring in Nimes, France

on . . Hits: 22837

cen meeting wg41 nimes   The second meeting of the Working Group (WG) 41 that is dealing with the first European Norm that will regulate the so-called “e-noses” took place in Nimes, France, the 11th of February 2016. In this meeting the title of the norm was further discussed. The question raised was: sensors for monitoring odorants or odours?

    Odorant? why not odour monitoring? A clear terminological distinction should be made between odorants (stimulus) and odour (sensation). In the same way that the olfactory system transduces chemical signals into perception (odours), the sensors "transduce" odorant signals into electric signals.

   These electric signals can be compared afterwards with an odour concentration determined by dynamic olfactometry, and yes, you might correlate afterwards, though sometimes it is a hard task. However, at the end of the day, once your sensor is set in a plant, it will not "smell" odours, it will just detect odorants.

   That is why most of the members are not comfortable with the term "e-nose". It might be electronic, but there is no "nose" here.

   However, the term "e-nose", though incorrect, is very handy as it expresses in a short word the aim of the device. Also it is a fantastic marketing name, I think that "sensors for odorant monitoring" does not sound very marketable, does it?

   The committee discussed some other names and somebody mentioned the term "o-sensor" as opposed to "e-nose" but no decision was really made on this matter.

   However, as I am the one writing this article, I like the term plus it is a bit tiring writing all the time "sensors for odorant monitoring" I will be using the term "o-sensor" from now on, until a definite agreement is reached. I hope my colleagues will ever forgive me.

   Besides, a list of definitions from three different norms was selected by consensus. The three norms were the European Norm EN 13725, the Dutch norm NTA 9055 and the German norm VDI/VDE 3518.

   Some examples of systems used as sensors for odorous gas monitoring were discussed and a first list of o-sensors was included in the text. However, is a list of type of sensors really necessary? Will this list outdate the norm if other types of o-sensors are discovered over the process of discussion of the norm? These questions were also discussed.

   An important part of the meeting was the discussion of the division of the work into Task Groups (TG). The TGs proposed in this CEN committee will address the following topics:

  • Task Group 1: Minimum requirements for instrumental odour monitoring systems.
  • Task Group 2: Establishing and validating the relationship between odour metric and odour.
  • Task Group 3: Terms and definitions.
  • Task Group 4: Descriptions and review of scope relevant technologies.


   If you find this article interesting, you might also be interested in these articles:


Comments (0)

There are no comments posted here yet

Leave your comments

  1. Posting comment as a guest.
Attachments (0 / 3)
Share Your Location

Please note that this site uses cookies in order to work properly.

See more about our cookie policy Learn more

I understand

Please read the following to learn more about our cookies policy:


What are cookies?

   A cookie is a text file stored in a user’s web browser on any device they use to access a website that holds information regarding the user’s visit, such as preferences. When the user returns, the browser provides the cookie with the stored information to the site.

What cookies are used for?

   Cookies are used for adjusting a website’s content to fit a user’s preferences and optimize the website. They store useful information that improve the user’s experience of a website. They are most commonly used for:

  •     Recognizing the type of device a user is browsing with and any preferences applied to optimize the website specifically for the device.
  •     Creating statistics that help website owners to understand how their users interact with their website, which allows them to improve their structure and content.

What types of cookies are used?

   There are two types of cookies: persistent cookies and session cookies. Persistent cookies remain on your hard drive for a period of time specified in the cookie’s file parameters or until removed manually. When you return to a website and it requires you to login again despite previously storing your login information, it is usually because the persistent cookie expired; this helps to increase security while maintaining accessibility.

   Session cookies, on the other hand, are used temporarily and expire once the website or browser is closed. They are used to track user activity on a website during a single visit. When a website requires that you verify your age or location once every visit before allowing you to view content and without requiring additional personal details, that is a session cookie at work.

Do cookies include personal data?

   If there is a need for the collection of personal information, such as for creating accounts, then cookies may store personal information. However, it is required by data protection law that users are informed of the collection of personal data. This data will also be encrypted to render it inaccessible for unauthorized users.

Managing cookies

   By default, browsers are configured to accept cookies. However, these settings may be changed to block cookies entirely, or to inform the user each time they are used. Detailed information about cookies and the options associated with them are available in each browsers’ settings.

Which cookies does collect olores.org?

   Olores.org collect cookies for 2 purposes:

  • Register statistical data.
  • Set language preferences.

   In addition we use third party cookies through Statcounter to collect different data.

StatCounter Analytics Cookies

   StatCounter is a web analytics service. We use StatCounter to track activity on our website. These stats help us to understand how people are interacting with our website and to improve the design and functionality of our site so that we can offer a better online experience to our visitors. If you visit olores.org, a StatCounter analytics cookie (called "is_unique") may  be placed in your browser.  This cookie is used only to determine whether you are a first-time or returning visitor and to estimate unique visits to the site. No personal information is stored in the cookie.

Refuse Statcounter cookies.

You may set your browser to refuse/accept StatCounter analytics cookies by clicking here.


    • Your decision to refuse/accept StatCounter analytics cookies applies to all websites which use the StatCounter service (including the StatCounter site itself).
    • If you refuse all StatCounter analytics cookie, a refusal cookie (called "refusal_cookie") will be set to remember this preference and any existing StatCounter analytics cookies in your browser will be destroyed.
    • If you delete/remove/destroy the refusal cookie, you must revisit this page in order to re-set your preference.
    • The refusal cookie is set only for your current browser and machine. If you use multiple browsers/machines, you must set a refusal cookie in each case.
    • You can also change your cookie settings directly in your browser. Learn more about cookies and how to manage them here: http://www.allaboutcookies.org/cookies/index.html
    • Or you can learn about how to adjust cookie settings for specific browsers here: