A Wide Range Direct Reading X-Ray Dosemeter

Abstract

Portable, battery operated and direct reading the circuit of a dosimeter is presented. It is essentially a direct-coupled amplifier with negative feedback and a pre-set compensator for component variations and chamber volume. It operates for dose rates down to 0.45 mr and registers 0.045 mr/sec. full scale. The instrument is rated at a long-term accuracy of 5% for higher ranges and 10% for the lower ranges.