Geiger Counter external tube IEC REF 1884-002

This  Geiger Counter is powered by 3 AA batteries and uses a remote  GM tube and holder connecting by a standard BNC plug. The large sensitive tube is of the thin mica window type and detects gamma , Beta and high energy alpha particles. Counts can be selected to be continuous, counts over preset times or rate displayed as counts/seconds. Requires item 84-003  MX168 tube