MOx sensor dataset: Odour pulses of various concentration levels

<p><strong>Metal-Oxide (MOx) electronic nose (e-nose) sensor recordings, for odour pulses of various concentration levels&nbsp;</strong></p> <p>This data is a subset of a larger, yet unpublished dataset -&nbsp;collected by the following authors: Dennler N., Drix D., Warner T., Rastogi R., van Schaik A., Schaefer A., Schmuker M.</p> <p>&nbsp;</p> <p>The custom-made electronic nose used to collect the data is a successor of the device described in Drix &amp; Dennler et al. [1]. It&nbsp;comprises four Metal Oxide (MOx) gas sensors operated at a constant heater voltage, and .&nbsp;</p> <p>The odour stimuli were provided by a&nbsp;multi-channel odour delivery device that is described in detail by Ackels et al. [2]. It offers a&nbsp;high temporal fidelity, which is achieved by combining high-speed gas valves, flow controllers, as well as short and narrow gas pathways.&nbsp;</p> <p>The data collection comprises of recordings where&nbsp;odourant headspace samples were embedded in constant airflow and presented to the e-nose. Data of four different odourants were used: Ethyl Butyrate (EB), Eucalyptol (Eu), Isoamyl Acetate (IA), and 2 - Heptanone (2H).&nbsp;EB, Eu and IA gases were diluted in mineral oil at a ratio of 1 : 5, and 2H was diluted in a ratio of 1:50. The delivered odour concentration was varied by modulating the valve shutter duty cycle, ensuring a linear relationship between five different concentration levels (E.g. C5 = 5 x C1). Fluctuations in flow during gas presentations were minimized by careful calibration.</p> <p>The filenames consist of the timestamp (in processor time), the gas identity, and a concentration level between 1 and 5.&nbsp;</p> <p>&nbsp;</p> <p>[1]&nbsp;D. Drix, N. Dennler and M. Schmuker, &quot;Rapid Recognition of Olfactory Scenes with a Portable MOx Sensor System using Hotplate Modulation,&quot;&nbsp;<em>2022 IEEE International Symposium on Olfaction and Electronic Nose (ISOEN)</em>, Aveiro, Portugal, 2022, pp. 1-4, doi: 10.1109/ISOEN54820.2022.9789654.</p> <p>[2]&nbsp;Ackels, T., Erskine, A., Dasgupta, D.&nbsp;<em>et al.</em>&nbsp;Fast odour dynamics are encoded in the olfactory system and guide behaviour.&nbsp;<em>Nature</em>&nbsp;593, 558&ndash;563 (2021). https://doi.org/10.1038/s41586-021-03514-2</p>