Surface Contamination Monitor

The proportional counters are similar in efficiency to other counters, but have backgrounds associated with small area detectors. This results in improved sensitivity, due to low background, and specific identification of the location of the radioactivity. When performing surface surveys, data is uploaded for each 2" of detector travel as determined by a precision wheel encoder. The survey data is then recorded for each 2" x 2" (25 cm2) area over the entire surface.