Gamma counter

Technologists use a gamma counter to measure hormone concentrations in the blood and pituitaries using such methods as radio-immuno assays and competitive protein-binding assays.
Technologists use a gamma counter to measure hormone concentrations in the blood and pituitaries using such methods as radio-immuno assays and competitive protein-binding assays.

A gamma counter is an instrument to measure gamma radiation emitted by a radionuclide. Unlike survey meters, gamma counters are designed to measure small samples of radioactive material, typically with automated measurement and movement of multiple samples.