Meaning of proportional counter

propor'tional count'er

Pronunciation: [key]
— Physics. Physics.
  1. a radiation counter in which the strength of each electric pulse generated per count is proportional to the energy of the particle or photon producing the pulse, alpha particles producing a different electric pulse from beta rays.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.