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Meets the Standards
The AC'SCENT Olfactometer tests odorous air samples following EN13725 and ASTM E679.
The single station design allows for flexibility in number of assessors utilized for testing sessions.
The AC'SCENT is constructed of tested and proven components.
Rotary Selector Dial
The first of its kind rotary selector dial allows the assessor to control the sniffing port observations. The olfactometer randomly places the dilute odor in one of three positions for each dilution level.
Detection & Recognition Thresholds
For each dilution level, the assessor selects one of the three presentations by guessing, detecting one port as different, or recognizing an odor character in one port.
SWIFT Nasal Mask
The custom designed SWIFT Nasal Mask is Teflon coated carbon-fiber epoxy. The mask slots allow presentation air to flood the nose while excess air is released away from the assessor.
Setting the Standards
The AC'SCENT Olfactometer has the features that all other olfactometers have since tried to match. Our innovations set the bar for all others.
The AC'SCENT Laboratory Olfactometer
The AC'SCENT Olfactometer is a laboratory olfactometer used to measure odor thresholds according to international standards. Current installations include universities, research institutions, engineering firms, and sanitation districts worldwide.
Dimensions: 24 x 24 x 54" (61 x 61 x 138 cm)
Weight: 350-lbs (160 kg)
Sniff Ports: Single station, single sniffing port
Testing Modes: Triangular Forced-Choice
China odor testing methodology
Concentration Series: binary (2-fold) dilution series
Ascending series for all modes, except China testing method
Presentation Flow Rate: 20-LPM, can be customized
Dilution Range: 23 to 216 (Nominal 10 to 100,0000 dilution ratios)
Repeatability: Meets EN13725:2003 requirements
Number of Assessors: Single Stations allows for as many assessors as you choose
Sniff Time: Adjustable from 1-60 seconds (3-seconds common operation)
Required Sample Size: 5-L consumed by 10 observations (5 assessors x 2 rounds) at 20-LPM with 3-sec sniff time.
Air Supply: Self contained zero-air system in base of cabinet.
Includes compressor, air drier, and carbon filtration.
Power: 115VAC/60Hz or 230VAC/50Hz
Control: PLC driven for automated increment through the dilution series.
On-board keypad control for settings.
Data Management: Optional attached laptop or desktop to collect results via DataSense Olfactometry Software Application
Q: Why is the AC'SCENT only a single station?
The AC'SCENT Olfactometer was designed as a self contained single station olfactometer. This allows the olfactometer to: 1) occupy a small laboratory space, 2) easily accommodate any number of assessors, and 3) be moved within a laboratory without need for long connectors to an air system.
Q: How can the AC'SCENT operate in Triangular Forced-Choice with only one sniff port (mask)?
The AC'SCENT has an innovative control rotary dial, which the assessor turns to three "port" positions. When the assessor presses the button, the on-demand system either presents the assessor with the scheduled diluted odor or one of two blanks. The assessor requests a sniff from each of the three positions. The dilution air system is purging at many times per second and there is no carry-over between the dilute odor and the blank positions.
Q: How long does it take to process one odor sample ?
An experienced panel of 5 assessors will complete evaluation of two rounds of testing one sample in 15 to 20 minutes. Therefore, 3-4 samples are processed per hour of testing.
Q: Does the AC'SCENT require a computer to operate it?
The AC'SCENT is a self contained olfactometer with the PLC computer system on-board and controlling operations of the olfactometer through the operator keypad. A laptop or desktop computer is only needed to operate the DataSense Olfactometry Software application. This software receives results from the olfactometer via a serial cable and then automatically computes the sample results. DataSense keeps a database record of all odor samples tested as well as assessor testing and training histories.
AC'SCENT Laboratory Olfactometer Product Sheet (PDF)
McGinley, C.M. and McGinley, M.A.
A&WMA Symposium on Air Quality Measurement Methods and Technology
San Francisco, CA: 13-17 October 2002
McGinley, M.A. and McGinley, C.M.
A&WMA 94th Annual Conference
Orlando, FL: 25-28 June 2001
St. Croix Sensory is ISO/IEC 17025:2005 Accredited