PERSONAL RADIATION DOSE INDICATORS WITH SENSORS FOR DIFFERENT LEVELS OF RADIATION PENETRATION

摘要

The radiation dose meter/indicator apparatus comprises a plurality of electronic radiation detectors (2) each sensitive to a different radiation range. A signal processor receives a signal from each of the detectors and provides a signal indicative of penetrating dose and superficial dose. A second signal processor, display (3) and alarm means (4) is also provided, the said second signal processor providing drive signals for the display (3) to facilitate the selective display of digital data indicative of any one of the following parameters; superficial dose, superficial dose rate, cumulative superficial dose, penetrating dose, penetrating dose rate, or cumulative penetrating dose, and to provide an alarm signal if one of these parameters exceeds a predetermined threshold. The apparatus may include a standby mode of operation to optimise battery life and optical means for the input and/or output of data. IMAGE