I'm developing a breathlalyzer which need to have the same quality and function like common commercial products in the market (probably the same with 200$, 300$ products). However, I don't find any alcohol gas sensor having enough quality. There are one called MQ-3 on Sparkfun or Seedstudio but it's not fulfil my purpose.
Anyone know that kind of Alcohol Gas Sensors are being used on commercial product, please let me know. Thank in advance.