Imagine a group of P.I detectors that create zero interference to each other.

[detectormods]

This is patented world wide, only used on prototype units so far, works perfectly.

https://patents.google.com/patent/US9151863B2/en

[moodz]

Non interfering detectors might be useful in a minefield ... but speaking on personal experience I dont want my detecting buddy that close to me on a nugget patch.

[detectormods]

Non interfering detectors might be useful in a minefield ... but speaking on personal experience I dont want my detecting buddy that close to me on a nugget patch.

ever go out with a detecting club?

[moodz]

ever go out with a detecting club?

Yes I am in a club ... but we only have one member ( me ).

[Riss]

Yes I am in a club ... but we only have one member ( me ).

In my country, the cheapest offer (tariff) from the companies for mobile connection (cell phones) is: "talking to yourself for 0 cents per minute" - completely free calls with your club members! – I also use this offer...

[Oscillllator]

This looks like time division multiplexing, but applied to metal detector pulses. It would require the pulse induction detectors to reduce their overall duty cycle in proportion to the number of detectors present in the area, so it's not like it would be without cost.

[Altra]

This looks like time division multiplexing, but applied to metal detector pulses. It would require the pulse induction detectors to reduce their overall duty cycle in proportion to the number of detectors present in the area, so it's not like it would be without cost.

No complex multiplexing. It has a single large tx coil spread out on the ground. Then you can have multiple rx only detectors working within the loop. Each receiver is synchronized to the master tx pulse. I remember Eric Foster demonstrated this idea in the 1980's or 90's?