Gas Sensor output voltage to concentration I am using figaro tgs gas sensor (2600, 2602 and 2620) to sense breath from human. What I obtained is the output voltage. However, I would like to convert the voltage to concentration in ppm? Since these gas sensors can sense more than one gas. Is there any way?? Thanks.
I would like to convert the voltage to concentration in ppm?
Is there any way??

the datasheet for those devices would have the answers for you. Generally, you read the datasheet BEFORE deciding on using them or not. not that otherway around.