Jérôme Demers from the Université de Sherbrooke built this fun Fart Meter, I can just imagine how much fun this would be in an office environment. 🙂 The meter uses an Arduino to monitor a Methane sensor, the dial then indicates how much gas it detected. Not sure I would want to be a judge in this competition… You probably remember Jerome from his Robot Build that he shared with us before. If you haven’t read his blog before it is worth a look, especially his escapades as intern toy designer in Hong Kong.

“The MQ-4 can detect natural gas concentrations anywhere from 200 to 10000 ppm (Parts Per Million).
It is very sensitive and has a quick response time. This sensor is analog and gives out voltage depending of the gas concentration. When there is no gas, the voltage read is around 1.3V.Otherwise, when you fart, it goes up to 5V! “