Portable geiger counter with removable probe.
The rotary switch has 6 positions:
off - power off
bat. - the top of the meter scale is marked bat.OK
HV - about 1/3 up from meter zero is a narrow band marked HV OK
x100 - 50 mR/h or 60,000 cpm
x10 - 5 mR/h or 6,000 cpm
x1 - 0.5 mR/h or 600 cpm
