A lot of people have peanut allergies. Some people are affected by small amounts of peanut oil in foods that were just processed near peanuts. A menu for them is a dangerous place. Why not make a peanut detector that would sniff food and tell the owner if it had peanuts in it.
- It would have to be handheld
- easy to use
- cost less than $200
The market would be millions of them. I suspect that there is a chemistry breakthrough required to make it happen. And as a result there will be a very rich chemist when a detector/indicator is invented. Right now there are lab kits and dogs that can detect peanuts in products but they don’t meet the above criteria.