What are the limitations of treasure hunting metal detectors?

  • Thread starter Thread starter wolram
  • Start date Start date
AI Thread Summary
Treasure hunting metal detectors face limitations in discriminating between ferrous and non-ferrous objects, as well as ground minerals. The effectiveness of these machines largely depends on their field strength and frequency settings. Higher frequencies can improve sensitivity to small objects, while lower frequencies may better penetrate mineralized soils. The design and technology of the detector play crucial roles in its performance. Understanding these factors is essential for optimizing treasure hunting efforts.
wolram
Gold Member
Dearly Missed
Messages
4,410
Reaction score
555
This is a tresure hunting MD, the design needs a way of discriminating from ferrous, none ferrous objects, and minerals in the ground, what are the limits
of such a machine ?
 
Engineering news on Phys.org
Hi all I have some confusion about piezoelectrical sensors combination. If i have three acoustic piezoelectrical sensors (with same receive sensitivity in dB ref V/1uPa) placed at specific distance, these sensors receive acoustic signal from a sound source placed at far field distance (Plane Wave) and from broadside. I receive output of these sensors through individual preamplifiers, add them through hardware like summer circuit adder or in software after digitization and in this way got an...
I have recently moved into a new (rather ancient) house and had a few trips of my Residual Current breaker. I dug out my old Socket tester which tell me the three pins are correct. But then the Red warning light tells me my socket(s) fail the loop test. I never had this before but my last house had an overhead supply with no Earth from the company. The tester said "get this checked" and the man said the (high but not ridiculous) earth resistance was acceptable. I stuck a new copper earth...
I am not an electrical engineering student, but a lowly apprentice electrician. I learn both on the job and also take classes for my apprenticeship. I recently wired my first transformer and I understand that the neutral and ground are bonded together in the transformer or in the service. What I don't understand is, if the neutral is a current carrying conductor, which is then bonded to the ground conductor, why does current only flow back to its source and not on the ground path...
Back
Top