The owner (of the grey meter i used) said he added a small amplifier to it.
I can't make such a detector myself, but i'm sure some guys can.
The parts are likely very cheap.
If you can make this or let make it for cheap it may be worth to have.
Not sure. I just share what i find.
(I might film it some more in new videos).
When i use the grey meter, i think i react to the EMF it makes itself,
not something i have with my other meters.
You could simply solve this by attaching it to a short stick though
(like you have seen me do in other videos)
but the meter usually detects more when i hold it (not always)
since the body acts as an antenna.
Usually one doesn't measure ones house for hours and hours every day, so.
Touching other things like a computer mouse is much worse,
since this often does have to happen for hours on end daily.