It seems like this would do the trick: http://www.polimaster.com/products/electronic_dosimeters/pm1904a_/ http://www.polimaster.com/products/electronic_dosimet

It seems like this would do the trick: http://www.polimaster.com/products/electronic_dosimeters/pm1904a_/ http://www.polimaster.com/products/electronic_dosimeters/pm1... At least if your phone could alert you when you're being irradiated you could take note.