A physical model equipped with two heat-sensitive thermistors, of which only one is coated with polymer film for adsorbing odoriferous material in ordor to measure the odor, was established.
Each thermistor is connected with Wheaston bridge, by which the change of adsorption heat generated by adsorption of gaseous odoriferous substance on the coating film of the thermistor is transformed into the change of resistance, thence into the change of electric current that is recorded through DC-amplifier.
This apparatus employed “Two Path System”. Each response of twenty one species of odoriferous substances was measured by the apparatus and corresponding human olfactory response measurable by the same as an appropriate sensory scale.
In examination of the relationship between the ammetric response by the apparatus and human olfaction, it was discussed whether there be possible that this apparatus would serve for estimating odor intensity and characteristics as substution for human olfaction.
