Geiger counter (dosimeter).

Dosimeters, radiometers, roentgenometers and other similar devices.The Geiger counter (dosimeter) was produced presumably since 1975 by the Leningrad plant "Electrodelo". Designed to detect radioactive ionizing radiation and its intensity. External power supply - battery type "KBSL" - 4.5 V. Emitter - earpiece. The power supply of the meter itself is carried out with a voltage of 390 V through a converter. There is no other information on the device. The photo of the dosimeter was provided by Aleksey Egorov, Divnomorsk, Krasnodar region.