A simple to peform, put coin or gold in bag place under a 20L bucket, fill the bucket with dirt or sand till you can no longer get signal then take just enough out till you get signal again. If bucket isn't deep enough use plastic bin.
You should be able to measure how deep. Simple place strong torch on top of dirt & measure side of bucket where the light shines through bucket. Easy test for detector depth without digging holes.
This is also better than air test and will give the operater a great indication of performance of that detector in the field you can also vary targets if desired.
You should be able to measure how deep. Simple place strong torch on top of dirt & measure side of bucket where the light shines through bucket. Easy test for detector depth without digging holes.
This is also better than air test and will give the operater a great indication of performance of that detector in the field you can also vary targets if desired.