Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Electronic schematic of the used oscillator circuit. (b) Gas measurement setup for characterizing the developed e-nose system. (c–e) Photographs of a mobile quartz crystal microbalance (QCM)-based electronic nose (e-nose) equipped with a data acquisition (DAQ) system.
