An aerosol generating apparatus is provided, including a chamber configured to receive an article comprising an aerosolizable medium and a detection circuit configured to generate data indicative of the presence of an article comprising an aerosolizable medium within the chamber. The detection circuit can include an inductor and a capacitor arranged in a resonant circuit and a detector configured to measure the resonant frequency of the resonant circuit and output data indicative of the presence of the article in the chamber based on the measured resonant frequency. There is also provided a system for generating aerosol, an article and method of determining the presence of an article including an aerosolizable medium.