Olfactometer is a device that used to determine odour concentration, odour intensity and hedonic tone. This is achieved by diluting the odour sample with odour-neutral air, which is then presented to a panel. The dilutions may be done by volume or flow-rate and are referred to as a static olfactometer or dynamic olfactometer respectively.
Olfactometer device may be a mobile unit or permanently in place. It is important to note that the olfactometer should be in an odour free environment so as to not to interfere with measurements. Materials used in an olfactometer must be odour neutral such as stainless steel or PTFE.