counter tube
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| Noun | 1. | counter tube - a measuring instrument for counting individual ionizing events crystal counter - a counter tube in which an ionizing event increases conductivity Geiger counter, Geiger-Muller counter - counter tube that detects ionizing radiations measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something proportional counter, proportional counter tube - counter tube whose output pulse is proportional to number of ions produced scintillation counter - counter tube in which light flashes when exposed to ionizing radiation |