The Transcint Model 1001 monitor was a transistorized gamma ray monitor based on a scintillation counter rather than on 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. Although this model of detector was first sold and advertised as a gamma counter (see artifact 2018-116), this particular instrument has been altered to detect fast neutrons. Comparing the electrical circuit components in the two artifacts indicates that changes in the circuit design were made. Note that there appears to be no absolute measure of the fast neutron flux: the meter indicates relative values only.