The Transcint Model 1001 monitor was a transistorized gamma ray monitor based on a solid-state scintillation detector rather than on a gas-filled detector such as a Geiger tube or an ion chamber. It stands approximately 35 cm tall and the detection unit and electronics are housed in a removable fiberglass container. The counter was manufactured by Canadian Aviation Electronics around 1955. This particular unit has a note on the side of it warning radiation surveyors not to confuse it with the fast neutron monitor of similar construction which is artifact 2018-117. Note that there are three exposure rate ranges selectable, giving the instrument an exposure rate range from environmental background levels up to 2 mR/h. The last photo was extracted from http://national-radiation-instrument-catalog.com/new_page_93.htm
