A Model 687 Minometer used for reading and charging personal dosimeters. For charging, the personal dosimeter would be mounted on the upper of the two right-hand ports seen in the top photo. The metal-cased module measures 27 cm in length and is 18 cm wide. This unit, labeled Minometer II on the front chassis, was a successor to artifact 2018-121. The lowest photo, generated for public demonstrations of radiation detection at CRNL, indicates the purchase cost of the instrument was $300 (in ~1965).
