I have traveled with a nuclear soil density gauge a few times and was always told to keep it in the truck at night so as to minimize my exposure. That said the

I have traveled with a nuclear soil density gauge a few times and was always told to keep it in the truck at night so as to minimize my exposure. That said the case was locked and the case was then locked by two independent locks to the truck. The gauge I was using used small cesium and americium sources.