2) CDV-742 Radiation Detectors & 1) CDV-750 Charger  
CDV-742

 The CDV-750-5b Dosimeter Charger is a self contained
battery-operated instrument. It will charge to zero any self-reading dosimeter which has a
standard military or O.C.D.M. charging end. Specifically designed for use with MILITARY
O.C.D.M. and CITIZENS Dosimeters. Contained in a two-part metal case which measures 4" x 4" x 2". The charging contact has a screw-on cover which is permanently attached to the case. Includes 1 charger and 2 Dosimeters.

The CDV-742 Radiological Dosimeters are electrostatic devices used for measuring an
accumulated dose (over a period of time) of radiation. The civil defense dosimeters are a standard dosimeter design. This same type of dosimeter would be used anywhere people would have to measure their accumulated radiation dose. The electrostatic type of dosimeter is charged with a dosimeter charger (pictured above). This charger, charges the inner chamber of the dosimeter tube with a high voltage charge which zeros the dosimeters hair like crystal in the viewing scale. When ionizing gamma radiation passes through the dosimeter it discharges it causing the hair like crystal to move up scale resulting in a reading of the accumulated dose recieved by the dosimeter.