ionization chamber

English Thesaurus

1. a measuring instrument that measures the amount of ionizing radiation (noun.artifact)

hypernym	:	measuring device, measuring instrument, measuring system,
definition	:	instrument that shows the extent or amount or quantity or degree of something (noun.artifact)

hyponym	:	boron chamber,
definition	:	an ionization chamber lined with boron or filled with boron trifluoride gas for counting low velocity neutrons (noun.artifact)

hyponym	:	geiger tube, geiger-muller tube,
definition	:	an ionization chamber contained in a tube in a Geiger counter (noun.artifact)