AC'SCENT Olfactometer

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.





  • The AC'SCENT Laboratory Olfactometer is the most common olfactometer utilized in North America today.

  • The AC'SCENT meets all requirements of EN13725, ASTM E679, AS/NZ 4323.3, and China odor testing methodologies.  This was the first olfactometer in the world to incorporate the requirements for all of these standards.

  • The single station design allows for easy operation with any number of assessors.  Assessors rest their nose while others take their turn completing their dilution series testing round.

  • The innovative self-contained design has the zero-air dilution system built right into the cabinet.  Just plug it in and it is ready to go.

  • An olfactometer developed and supported by the most experienced odor laboratory in North America.

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
                             Binary Forced-Choice
                            Direct Presentation
                            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)




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