How to detect underground cavities!

[Auftragssucher]

Hi.
Yes i ask him, the depth was about 2 meters at good soil.

Regards

2 Meters,..hmm, good,...but good enough? Hmm... We'll see!
We'll test the device next sunday!
Thanks, Geo!

[target]

its a mystery why the big names havent filled this need as civil engineering workers need a quick and easy tool to find the track of ducts and buried chamber s..before they dig in the wrong spot !