An AEP-1910 beta/gamma radiation detector. The hand-held monitor measures 47 cm in length overall and was used mainly to check for radioactive contamination on equipment. It was capable of measuring up to 20,000 counts per minute and had a low–battery indication setting on the meter scale. The barrel containing the Geiger tube had a series of holes machined into the aluminum protective cover to allow measurement of beta activity. There were several versions of this counter developed.
