Metal Detector Search Coils - Search Deeper, Faster & Smarter
Large Search Coils
Larger coils not only help you search deeper, they also
give you better ground coverage, you will cover more of the
surface area of your site faster. However, they are not so
good for sites with a lot of iron or junk. Detecting a
nonferrous target close to a piece of iron will cause the
detector to 'blank out' the good target. Many large coils
are less likely to detect small items, so a large search
coil may mean sacrificing some sensitivity.
Small Search Coils
Smaller search coils are good for trashy
sites and for sites with lots of iron contamination. A small coil will really help you get to the good targets
between the nails. The big draw back of small coils is the
loss of depth.
The smaller the coil, the harder you will have to work,
your ground coverage is significantly reduced, so the time you
take to search a site will dramatically increase.
Specialist search coils
Garrett make a hoard hunter 'two box' type search coil for
their higher end computerized machines. This coil will find
larger objects buried deeper in the ground, but will not
detect single coins or small artefacts and is intended
hoard hunting, not for general metal detecting.