Show all Electronic Noses Manufacturers

Electronic nose information selectionElectronic noses detect and identify odors and flavors. These devices can sense the underlying chemical makeup of an odor, each of which has a recognizable fingerprint, and also determine the presence of VOCs or contaminants. However, this quantitative analysis does not portray a sample's specific odor, as there are other variables beyond particle concentration to be considered, and the olfactory sense is subjective amongst individuals.

 

The sensing technology encompasses:

 

  • Metal-oxide-semiconductor field-effect transistor (MOFSET): charged odor molecules are perceived by the electric field of the MOFSET, which is amplified and fed to a processor to recognize the electric signal.
  • Intrinsically conducting polymers (ICPs): organic polymers with good electrical conductivity, which act as semiconductors.
  • Polymer composites: resistive polymers with a conductive filler or additive.
  • Quartz crystal microbalance (QCM): the acoustic resonance changes when a gas leaves any mass on the surface of the crystal.
  • Surface acoustic wave (SAW): frequency modulations are detected and referenced, which occur when passing through any particulate.

Image credit: Rourkes Group/Caltech