radiation counter

https://doi.org/10.1351/goldbook.R05053
radiation measuring assembly comprising a radiation detector in which individual ionizing events cause electrical pulses and the associated equipment for processing and counting the pulses. Often an expression is added indicating the type of radiation detector (e.g. scintillation, semiconductor ).
Source:
PAC, 1994, 66, 2513. 'Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)' on page 2516 (https://doi.org/10.1351/pac199466122513)