An AEP 5210 beta dosimeter. The dosimeter stands 23 cm tall and is 20 cm in overall length. The dosimeter was designed by AECL and a sticker on the side indicates this unit was manufactured by Canadian Admiral Corporation Ltd. The scale indicates beta dose rates of 0-100 rad/h on a logarithmic scale. The probe has a 3 cm diameter and is 14 cm in length. A plastic cover protects the detection end of the probe which has a central exposed diameter of ~2.5 mm. The detector is a silicon p-n junction, reverse-biased diode. Readings are normally taken both with and without the cover to determine the gamma ray component of the radiation. The history of this artifact is unknown. A sticker on the side of it indicates it was used at “AECL -Toronto”. A calibration sticker indicates it was in use as late as 1992.
