Victoreen 545 Dosimeter

"The Victoreen 545 dosimeter is a direct-reading pocket dosimeter. It is designed to measure the total dose or accumulated exposure of moderate and high levels of gamma radiation on a scale of 0-20R. Use with any of our dosimeter chargers to set the dosimeter to zero. Although we assume these to be working, however, we do not warrant their functionality, accuracy or performance in a gamma environment or otherwise."