What a great idea, is it working reliably - I have a device I need this sort of thing for, pref very cheap with little extra in the way of components, did rsocor01 ever get it running? He didnt mention it on his other thread. Just wondering. would higher value resistors and a longer charge period help with the sensitivity?

I need this unit to be fairly reliable, is it likely to do this if set up right? Hopefully will be mass produced. Most commercial capacitive systems take a running average and are constantly resetting their zero point to allow for atmospheric conditions etc dont they?