Fig. 5: H2S detection application scenarios.
a Schematic diagram of halitosis diagnosis experimental device. b Response versus H2S concentration curve of the Zn/Ag/DNO sensor to the exhaled breath of a healthy volunteer/halitosis sufferer and simulated halitosis gas. c Photographs of the blank group and experimental group in pork spoilage monitoring. d Bottle with a piece of pork and blank groups were moved from the refrigerator (−18 °C) to RT (22 °C). The OCV of the sensors was recorded at intervals. e Schematic diagram of remote monitoring of H2S concentration in laboratories/factories using cloud technologies. f Wireless alarm demonstration by an App in a smartphone using Bluetooth technology. g Remote alarm demonstration: user was in the office while monitoring the H2S levels in the lab.
