Standardization of gas sensors in a breath analysis system

Breath analysis systembased on electronic nose(e-nose) uses gas sensors to detect biomarkers in breath. Then the health situation of peoplecanbe estimated by analyzing the responses of the sensors. As we know,Even for the same kind of gas sensor, the physical and chemical characteristics of each copy are not same. Therefore, theoutput results are usually not same when measuring the same sample by different breath analysis devices of the same model.This situation will greatly confine the application of the devices. In this paper, a selfdesigned breath analysis system isintroduced, then, a standardization method is proposed to counteraction the individual difference.The results show that our method is effective. It reduces the error caused by the device variance.