Skip to main content


The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

or click here to sign up for a free trial


The paper discusses the most important issue in odor measurement, instrument calibration, which is not carried out by most of the olfactometry laboratories around the world. During the 1980s, the development of olfactometry techniques in the Netherlands and elsewhere in Europe resulted in the introduction of the first draft European Standard for odor measurement by dynamic olfactometer. The critical requirement in the standard is the annual calibration of the dynamic olfactometer against a tracer gas. The calibration is to confirm the dilution ratio as specified by the instrument manufacturer. Unfortunately, most olfactometers in the past did not provide the user with an auto calibration capability and therefore the olfactometry laboratories had to perform the necessary calibrations manually. The calibration of such instruments is both time consuming and labor intensive. The paper discusses the technique of calibrating a dynamic olfactometer using CO gas. A series of CO concentrations are suggested. The effects of the CO sampling point locations (within the system and above the sniffing cup) and the arrangement of the CO sampling tubing (covered and uncovered) are discussed in detail. These sampling arrangements could have significant impacts on the dilution ratio. The Wang Olfactometer was able to achieve averaged instability of 1.7% and accuracy of 9% over the dilution range 1 – 16. It was found that both results were sensitive to the selection of the CO gas range. It is concluded that the calibration of a dynamic olfactometer should be carried out more frequently than once a year.

Document Type: Research Article


Publication date: January 1, 2002

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more