Aiming at characteristic of high relative humidity of test circumstance of butanone gas in odor reduction degree experiment of range hood

implementation methods for butanone gas detection under high humidity circumstance by using MOS gas sensor are studied.Two dehumidification methods are introduced: one uses desiccant to absorb humidity

the other mixes pure dry air into the test gases.Experimental results show that the first method doesn’t work properly since the desiccant absorb butanone gas as well as humidity.The second mothod can significantly reduce the relative humidity of the test gas and yield an accurate detection of the butanone gas concentration under high humid circumstance.The designed system can meet the requirement for odor reduction degree experiment of range hood.