Patent ID: 7755477

Claim:
A portable apparatus for preventing damages from DC magnetic field, AC magnetic and electrical fields, and high frequency/microwave radiation for implantable devices comprising: a channel for detecting DC magnetic field from 0.5 Gauss to 10 Gauss, and alarms when the field exceeds a threshold set by the implantable device manufacturers; a channel for detecting AC magnetic field from 1 mGauss to 3 Gauss, and alarms when the field exceeds a threshold set by the implantable device manufacturers; a channel for detecting AC electrical field from 1 KV/m to 8 KV/m, and alarms when the field exceeds a threshold set by the implantable device manufacturers; a channel for detecting RF/microwave radiation from 0.2 mW/cm 2 to 5 mW/cm 2 , and alarms when the field exceeds a threshold set by the implantable device manufacturers; and a low battery alarm circuit; and wherein the DC magnetic field detection channel further comprising: a DC magnetic field sensor; a DC signal processor; a comparator; and an analog display unit comprising a meter, or bar LED display, or vibrator, or flashing light, to provide visual and mechanical alarm signal for this application, or a digital display unit comprising individual LEDs or bar LED display to provide visual alarm signal; wherein the AC magnetic field detection channel further comprising: an AC magnetic field sensor; an AC signal processor; a comparator; and an analog display unit comprising a meter, or bar LED display, or vibrator, or flashing light, to provide visual and mechanical alarm signal for this application, or a digital display unit comprising individual LEDs or bar LED display to provide visual alarm signal; wherein the AC electrical field detection channel further comprising: an AC electrical field sensor; an AC signal processor; a comparator; and an analog display unit comprising a meter, or bar LED display, or vibrator, or flashing light, to provide visual and mechanical alarm signal for this application, or a digital display unit comprising individual LEDs or bar LED display to provide visual alarm signal; wherein the RF/microwave radiation detection channel further comprising: a RF/microwave radiation sensor; a RF/microwave signal processor; a comparator, and an analog display unit comprising a meter, or bar LED display, or vibrator, or flashing light, to provide visual and mechanical alarm signal for this application, or a digital display unit comprising individual LEDs or bar LED display to provide visual alarm signal; and the display unit, either analog or digital, further connected to a buzzer to provide audible alarm signal.