Geiger Counter 3 : Radiation and Radiological Disasters. An instrument that detects and counts the ionizing particles that pass through it; it is used to measure radiation
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}