A battery-operated, portable alpha radiation monitor. This detector, labeled an AEP 118A, has a sticker from Electronic Associates Limited, a Willowdale, ON, company. The electrical components and batteries are housed in a 25-cm-long by 12-cm-wide and 9-cm-high metal box. The 27-cm-long detector houses a zinc sulphide scintillator in a 4.7-cm-diameter round head behind a thin aluminized mylar window and protective screen. The light from the scintillator is channelled to a photomultiplier tube. The unit does not have a meter indicating the level of radiation, but instead has two 5-cm-diameter earphones for listening to the detector output pulses. The manufacturer of the earphones is Clevite Brush. The entire unit has a long shoulder belt and may well have been an early unit used for prospecting for radioactive ore.
