Radiacmeter CDV-718A Kit

I have another video on these meters but this one came to me as a kit minus the case. I later found a suitable Pelican style case . It has the usual probe for high and low radiation detection and the seldom seen Thorium 232 test source. This one came with the very hard to find "pancake" probe as well as the volume control device for the headphones. The included manual and documentation are also very scarce.