Field radiometer-roentgenmeter `` DP-5 '' (PRR-1).
Dosimeters, radiometers, roentgenometers and other similar devices.The DP-5 (PRR-1) field radiometer-roentgenometer was presumably produced since 1963. Designed to detect and quantify beta-contamination of the surface of various objects, as well as to detect and measure the levels of gamma radiation. The device has seven measurement sub-ranges: 1st sub-range from 5 to 200 R / h. 2nd from 0.5 to 5 R / h. 3rd from 0.05 to 0.5 R / h. 4th from 100,000 to 1,000,000 rpm cm2. 5th from 10,000 to 100,000 times / min. cm2. 6th from 1000 to 10000 times / min. cm2. 7th from 100 to 1000 times / min. cm2. The device is described in all details on the Internet. Photos of the device from the site: http://forum.rhbz.org/
