This paper describes the development and characterization of zinc oxide nanosheet gas sensor. Such sensor is integrated in the electronic nose system to test chlorinated hydrocarbon organics and chlorobenzenes. Then it is proved weather the electronic nose system as a new test method is feasible in the industry or not. The study bears out that the prepared zinc oxide nanosheet has better sensitivity and responsiveness, its operating temperature as an optimal parameter is 220 °C; the conversion voltage is 5V. The electronic nose has the highest sensitivity to chlorobenzenes, and the response intensity rests above 1000mV. In the test, however, the sensitivity of electronic nose to chlorinated hydrocarbon organics is relatively low. There is a clear linear relationship between the response intensity of the electronic nose and various noxious gases at the correlation coefficient of above R2=0.85. The types of the tested gases can be estimated by using a linear fitting curve and the appropriate intensity when a certain gas is tested with electronic nose.