Since most food adulterations are reflected on volatile chemical profile, Electronic Noses (ENs) appear as excellent candidates for process monitoring, freshness evaluation, shelf-life investigation, sensory and authenticity assessment, microbial contamination diagnosis [1]. In this study three applications recently carried out in our laboratory are presented and discussed, with the aim to illustrate three paradigmatic and diverse issues related to food quality control in which EN can find application and discuss the reliability of sensor technology in food analysis.