A Wide Dynamic Range Portable 60-Hz Magnetic Dosimeter with Data Acquisition Capabilities

A portable dosimeter has been developed for monitoring human exposure to power-frequency magnetic fields in residential and occupational environments. The microprocessor-controlled dosimeter has been designed to measure 60-Hz field intensities that vary from 20 ¿G to 600 mG, thereby covering the broad range of field levels generally encountered in households and occupational settings. A digitized resolution of 2.5 ¿G is provided in the 20 ¿G to 10 mG range, and 150 ¿G resolution in the 10 mG to 600 mG range. Automatic range switching is implemented for both signal processing and data acquisition.