A gamma ray, x-ray, neutron, alpha, and beta radiation counting instrument that measures scintillation light (or prompt fluorescence) produced by the interaction of the ionizing radiation and certain materials. A wide variety of inorganic crystals and plastics (liquid scintillators dissolved in a solvent and polymerized) can produce scintillation light. Material used will determine the kind of radiation measured and some can be used in severe environmental conditions unsuitable for other survey meters. It may include portable survey meters and stationary area monitors and consist of a radiation detection chamber, light sensor, power supply, controls, read out mechanism.