Electronic nose (E-nose) technology provides an easy and inexpensive way to analyse chemical samples. In recent years, there has been increasing demand for E-noses in applications such as food safety, environmental monitoring medical diagnostics. Currently, the majority of utilise array metal oxide (MOX) or conducting polymer (CP) gas sensors. However, these sensing technologies can suffer from sensor drift, poor repeatability temperature humidity effects. Optical sensors have potential...

In this paper, we report on the development of a simple, yet innovative multichannel olfactory display. Unlike other sensory stimuli (specifically sight and sound), digital technology has to have wide-spread commercial success. Our proposed system will release up eight different liquid phase aromas (essential oils) using thermal mechanism. The unit contains speed controlled fan, temperature control heating element, gas sensor provide feedback inform rate. It can be connected (via Bluetooth...

Abstract Thick film indium oxide chemiresistive sensors decorated with PdO and PtO 2 particles were investigated for oxygen detection under humid conditions (tested ranging from 20%–80% RH) across a temperature range of 50 °C to 400 °C. The -decorated In O 3 demonstrated significantly higher response oxygen, showing 500% increase at 200 compared the PdO-decorated (response values 41 8, respectively). Tests in dry air conducted assess effect humidity on sensor performance, revealing maximum...

A low cost portable photoionization (PID) sensor was successfully designed and manufactured. Unlike existing commercial PID sensors, our device provides two outputs, one associated with the total chemical components a second that some level of compositional information. We believe this makes system more useful than standard PID, similar, if not lower, point. Our tested gas concentrations down to 2 ppm isobutylene. These results indicate limit detection will be well below 1 ppm. Further tests...

In this paper, we report on the on-going development of a simple computer controlled odour generator. The unit comprises eight "aroma dispensers" that can be loaded with liquid samples (in our case fragrances such as tea-tree oil). These aroma dispensers use combination capillary effect and thermal heating to release user. instrument also includes fan gas sensor monitor aroma. Interaction generator is through custom interface releases aromas in line either direct control or preprogrammed...

Deep learning has yet to be widely applied in the field of chemical gas sensing, part due nature this data. Many applications sensing suffer from a limited number samples high dimensional In study, novel data approach is introduced address these issues and dataset mass spectrometry (MS) for melanoma detection. Samples were taken 32 patients presenting with dermatological mole. Various analyses performed. Traditional analysis such as primary component (PCA), linear discriminant (LDA),...

Industrialization produces detrimental effects for the environment, one of which is polluting air that we breath in. To monitor quality air, proposed fabrication semiconducting metal oxide based gas sensor. Indium materials were investigated oxygen sensing in dry environment. The deposited onto alumina sensor substrates 2 steps spin coating material followed by a photolithographic process to define area. sensors tested temperature ranging from 200-250°C and showed good response with highest...

Fused Deposition Modelling technology was used to fabricate a working gas sensor detect VOCs. The sensors were fabricated by incorporating metal oxide-based material, specifically tungsten oxide, with polycaprolactone. mixture made into pellets and extruded using filament extruder. best combination found be at 85% WO3 in WO3−PCL mixture. A modified FDM printer print the sensitive material onto substrate of alumina. testing results demonstrated that could 100 ppm isobutylene ethanol up 5 ppb.