About Acscent

About AC'SCENTŽ International Olfactometer

Olfactometer:

Dilution apparatus which mixes odorous air in specific ratios with odor free air for the presentation to a panel of observers.

Engineered with Common Sense
the AC'SCENTŽ International Olfactometer meets all international standards for olfactometry including:

ASTM E679-04	Determination of Odor and Taste Threshold by a Forced-Choice Ascending Concentration Series Method of Limits. (United States)
EN 13725:2003	European Standard on Determination of Odour Concentration by Dynamic Olfactometry. (European Community)
NVN2820	Provisional Standard: Air Quality. Sensory Odour Measurement using an Olfactometer. (Netherlands)
VDI 3881	Olfactometry: Odour Threshold Determination. (Germany)
These standards allow the use of two different analysis methods:
Forced-Choice Method:	The "Forced-Choice" presentation method, as described by ASTM E679-91, is called the "3-alternative forced choice presentation" method or the "triangular forced-choice" method. Each panelist performs the odor evaluation task by sniffing the diluted odor from the olfactometer. The panelist sniffs three sample presentations, one of which contains the odor while the other two are "blanks." The panelist must then select the one of the three that is "different" from the other two. This statistical approach is called "triangular forced-choice." The panelist is required to declare to the panel leader, either verbally or by pushing a button, if the selection is a "guess", "detection" , or "recognition", as defined by ASTM E679-91.
Yes / No Method:	The Yes/No Method is based on protocols used in audiometry. Each panelist sniffs a sample from the olfactometer. The sample is either a diluted odor or a "blank" of odor free air. The panelist then declares whether an odor is presented (Yes) or not (No). Six presentations are randomly delivered (three samples and three blanks) to the panelist at each dilution level.
Ascending Concentration Series For both test methods, after the first dilution level the panelist is then presented with the next dilution level. In the "Forced-Choice" method the panelist is again presented with three sample choices, one of which is the odor sample. However, in the "Yes/No" method the panelist again tests six randomly presented samples. However, in both cases this next dilution level presents the odor at a higher concentration (e.g. two times higher). The panelist continues to additional higher levels of sample presentation following these methods. This statistical approach of increasing levels of sample presentation is called "ascending concentration series."
The AC'SCENTŽ International Olfactometer has four Testing Modes: Yes/No Binary Forced Choice Triangular Forced Choice Direct Presentation

The AC'SCENTŽ International Olfactometer uses the odorless SWIFTTM Nasal Mask. SWIFT™ Nasal Mask was designed to meet specifications of international standards of olfactometry: CEN TC264 (Draft) Determination of Odour Concentration by Dynamic Dilution Olfactometry, Section 6.5.3 Interface Between Nose and Olfactometer.

The AC'SCENTŽ DATASENSE™ Olfactometry Software is a valuable compliment to your AC'SCENTŽ International Olfactometer.

DATASENSE™ Olfactometry Software

A MicrosoftŽ Access97 based run-time data base application (Access not required). Three years in development, this software has been specifically designed to save time and money in the olfactometry lab by eliminating tedious calculations and data manipulation by lab staff and project engineers.
File away all your current cheat sheets, scratch paper, and spreadsheets and replace it with this one easy to use program.

So who's using the AC'SCENTŽ International Olfactometer?
AC'SCENTŽ has proven to be a valuable research & odor testing tool for universities, municipalities, and industries like:
University of Minnesota
Iowa State University
Los Angeles County
Australian Water Technologies
University of Purdue
University of Alberta / Alberta Pork
University of Manitoba
State of Minnesota's Met Council - Environmental Services
Agriculture Canada
University of Illinois
W. Texas A&M University
The City of Los Angeles

We can also assist you designing your own odor laboratory and share knowledge from our many years of experience.

Beginning at under $35K (US), AC'SCENTŽ International Olfactometer is a sensible and essential tool for conducting odor testing and collecting valuable data. With our experience, we will understand your needs and demonstrate how you will benefit from AC'SCENTŽ
We can also help with financing and have a leasing program.

The AC'SCENTŽ International Olfactometer was designed by St. Croix Sensory, Inc. and EPG Companies - with cooperation from McGinley Associates, P.A., the University of Minnesota, and Iowa State University.

Contact us about AC'SCENTŽ, the International Olfactometer
Send mail to stcroix@fivesenses.com with questions or comments about this web site.
Copyright Š 1999 AC'SCENTŽ