An automatic sample changer for well-type scintillation counters

Abstract A simple and reliable automatic sample changes for use with well-type scintillation counters has been constructed. A maximum of 25 samples may be assayed at one time by placing them in special carrier assemblies which are then inserted in a turntable mounted above the counter. A moving platform engages each carrier assembly in turn and positions it in the well. Although designed to operate directly with, and without modification of, specific commercially-available equipment, its principle of operation permits it to be readily modified for use with other counters, scalers or ratemeters.