IDEA #2BGKW8 Electronic Nose "Gaz-2"

ELECTRONIC NOSE ““GAZ(cid:2)(cid:2)22”” APPLIEDRESEARCH • SENSORSDescription Array of eight quartz crystal resonators are covered with films of various organic sorptive materials (calixarenes, polymers) which have different sensitivity towards different volatile organic molecules analyzed. This device belongs to non(cid:2)flow type, i.e. after injection of analyte vapor working cell is cut off and no flow of analyte occurs under measuring stage. Due to absorption of analyte molecules onto sensitive surfaces of sensors frequency of quartz resonators is reducing. This fre(cid:2) quency shift is considered as a sensor response. Obtained array of sensors responses to pulse of analyte vapor is used for “teaching” system and after that – for recognition of chem(cid:2) ical image of analyte by means of special mathematical appa(cid:2) ratus for statistical treatment (PCA, Neural Network, etc.). After measurements working cell and sensors are cleaned with fresh dry air. Innovative Aspect and Main Advantages This device has 8 sensor channels, which allow determining the соtents of some pollutants simultaneously. The time of one(cid:2)fold measuring is 1 sec and the resolving power is 1 Hz. Areas ooff Application “GAZ(cid:2)2” can be used for environment monitoring to detect hazard pollutants in air, in agriculture and food industry for testing quality and freshness of fruits, meat, fish and other products. Especially great attention can be paid from per(cid:2) fumes producers and producers of beverages (brandy, vodka, beer, coffee). Another possible area of application is criminal(cid:2) istics and customer service for detection of drugs, explosive materials, etc. Fig.1. Electronic nose “GAZ(cid:2)2” Stage ooff Development Prototype developed and tested Contact Details Oleksandr Belyaev V. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine 41 Nauki Prospect, 03028 Kyiv, Ukraine Tel.: +(380(cid:2)44) 525(cid:2)40(cid:2)20 Fax: +(380(cid:2)44) 525(cid:2)24(cid:2)47 Email: belyaev@isp.kiev.ua Website: http://www.isp.kiev.ua INNOVATIVETECHNOLOGY OPPORTUNITIES FROM THE STCU 69