The QED is a single channel Pulse Induction metal detector using a differential integrator as the null summation / averaging means to null the ground and static magnetic fields. The Ground Balance method is based on the published papers or lapsed patents of the early pioneers Eric Foster, Poole, Chapman and Howells and more recently the lapsed patent of Dr. George Paltoglou and Australian Innovation Patent AU2010101019. The front-end blocking circuitry is US Patent No.: 10,181,720 B1, dated 15 Jan 2019 by Dave Emery and is used under license.
Click here to read the Dave Emery Patent.
Average current consumption 450mA
Voltage limits 6v min to 10v max
Audio PWM VCO & VCA
Digitisation method Bipolar Integrating (200uS) ADC
The display uses a 3 digit LED Backlit Transflective LCD
EMI Compliance # E5498