Olfactometers are instruments used to measure the amount of odour in an air sample (odour concentration), with calibrated and trained panellists.
Direct assessement: Most products and materials can be assessed directly, by smelling the product out of its packaging.
The PureSniff device is used when a product can not be assessed directly. An air sample is collected from the product, and the Pure Sniff delivers the same amount of air to each panellist.