How a breathalyzer works (alcohol sensor)

2014-02-24

[public] 132K views, 2.58K likes, 18.0 dislikes audio only

I teardown a commercial, handheld breathalyzer and discuss how it works, then test a standalone ethanol sensor.

http://www.seeedstudio.com/depot/images/product/MQ303A.pdf

http://www.kosmodrom.com.ua/pdf/MQ303A.pdf

http://www.sparkfun.com/products/8880

http://www-personal.umich.edu/~mswool/publications/Gas_Sensors_preprints.pd.pdf