Supersensitive smoke alarms warn us of the presence of smoke only.
But what would be the applications of a smoker-SMELL-only alarm?
It's all too horrible to contemplate - a robot that bongs at your front door just because you sneaked a drag in the loo three hours ago.
"Turn the dam' thing off. I didn't know it was going to be like this."-- rayfo, Jun 14 2001 Sorry PeterSealy. I didn't see sign : "This is a 'no joking' zone".-- rayfo, Jun 14 2001 random, halfbakery