Slowly leaking home plumbing can cause lots of damage if not detected. If it leaks slowly enough, whole walls and rooms can be rotted and moldy, requiring complete tear outs. It would be great to be able to determine the air humidity behind a wall and see if a leak is present. How about putting inexpensive passive moisture sensors (postage stamp size) behind the walls during construction. A handheld reader using RFID technology would send a signal out to power up the sensor behind the wall and take the moisture reading. Maybe you check it once every 6 months or so. The sensors and the reader would be sold in places like Home Depot and Lowes.
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If it did more then detect moister it could be really useful. Better yet if they could be installed into exsisting walls (for older homes) and integrated into a home management system it could be really useful.
The only other things of interest I can think of sensing behind a wall would be roaches, rats, and termites. What else is there?
awesome idea.
Great idea, but is it necessary? When I purchased my home, my inspector had a meter, that looked much like a stud-finder, that he pressed against the wall and sensed whether there was moisture behind the wall. If this accomplishes the same thing, it's not necessary to incorporate the procuct in the studs. It could be done after the walls are up. A variation might be to have the sensor adhered to the wall (I'm thinking a band-aid hidden behind a picture frame or something. Each of these band-aids would send a signal to a receiver that could display the moisture content.
The key will be remembering to test your walls periodically.