Noncontact Rapid Vapor Sensor Using Capillary Condensation to Monitor Ethanol in Sanitizer

We propose a noncontact rapid vapor sensor to monitor an ethanol concentration in sanitizers using capillary condensation nanoparticle film. Owing effect nanopore, layered film effectively condenses of liquids. The condensed liquid provides electrical conduction due ion current through the Vapor pressure ethanol-water mixture is defined by composition ratio. When with exposed headspace from mixtures, we observe transient impedance response depending on concentration. A higher gives faster decrement response. By this nanoscale physical phenomenon, evaluate commercial within 30 s. finds without contacting sanitizers. proposed method beneficial for on-site evaluation rapidly.