Many scientists use the term "olfactometer" to refer to a device used to study insect behavior in presence of an olfactory stimulus.
[citation needed] According to Lindstrom et al, continuous flow olfactometers enable very fast onset and offset timing, thereby creating a nice, square-shaped stimulus presentation.
In these designs, air flows continuously through or over the odor source and is then transported via tubing to the subject.
[7] The Nasal Ranger, developed by St. Croix Sensory, is a common brand of field olfactometer used in wastewater treatment plants, industrial facilities, and marijuana grow houses.
[9] CEN 13725:2003 - Air quality - Determination of odour concentration by dynamic olfactometry; German version EN 13725:2003.