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PI identification

R

rpanek

New member
Hi Guys, I'm new to this site and PI MDing. So if this question has been ask already, I'm sorry, as I have look for the answer to this question on the forums but to no avail. I know VLF's identify targets in the ground by there halo around them. Does a PI work the same way?? Thanks, Ray
 
I think you have it all wrong. This is my understanding: VLF detectors measure the phase shift in a target vs. the surrounding soil, not the halo. Different metal targets cause different speed shifts in the phase . There is no phase shift in PI. Pulse Induction detectors work on pulses that are shot into the soil. The way they detect metals is by the decay of the signal getting interrupted by metal targets and reflected back to the coil which is translated into a beeping sound of the detector.

White's TDI PI detectors do have two different tones for high conductive and low conductive targets allowing limited ID.
 
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