False signals caused by sand getting caught between coil and cover....A Myth??

[bottlebum]

In regards to false signals supposedly being caused by sand getting caught between the coil and cover.......can someone tell me what the difference is between having sand between the coil and cover and having no cover with the coil in direct contact with the sand?

Except for maybe when dealing with black sand, I see no difference in either of the two, aforementioned scenarios. Am I missing something here or is the whole idea just a myth? I only ask because I have never in my few years of water detecting, had this experience.

Bottlebum.....always wanting to learn.

 

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[Silver Surfer]

I think it is only a black sand issue, but have been told by several to clean the sand out if I am getting a lot of falsing.... I only rarely see black sand in Florida, and as far as sweeping over it, it doesnt seem to make a difference... So maybe there are different kinds of black sand?

 

[Captn SE]

It's the black sand (iron ore) which is the problem. You can have as much iron ore "free" sand between your coil cover and coil with no effect to your machine. If you have a good amount of the black sand trapped between your cover and coil, you may not notice a whole lot of falsing because your machine simply ground balanced out those magnetic minerals. However, your machine is not working at its fullest potential because the ground balance has been skewed by the trapped iron-ore under the coil, thus creating less than desirable depth potential. Large amounts of iron-ore will cause your machine to false, causing you to lower your sensitivity and greatly affecting your depth.

Less magnetic minerals = more detecting depth
More magnetic minerals = less detecting depth

HH,
CAPTN SE
Dan

 

[Sandman]

The idea of having a coil cover is to protect the coil from abrasions. The Iron "black sand" that gets inside the cover will affect the ground balance or just the way it operates as was said. After it is out of warranty you can remove the cover and coat the coil with marine epoxy to protect the plastic which is usually thinner on the edges of the coil. Coating it however lowers its resale value if you sell it.

 

[bottlebum]

I figured that it must be a black sand only issue but wasn't sure. I guess that I have been fortunate that I have yet to run into any.

Thanks for all of the replies and ..........

HH, Bottlebum

 

[CRAZY-TEXICAN]

If you plan on keeping it just re-coat it after every season , i hate coil covers ..

 

[johnnyboy25]

i remove covers when i do the beach

 

[Detectorfreak74]

{explorer se} I have not done much beach detecting but I do know out here in Utah the dirt has lots of iron in it and I have falsed before and the dirt is sandy in some parts