Step by Step Guideline to Maintaining Your Metal Detecting Coil

6 July 2011

Maintaining metal detecting machines is important if we want to ensure a long lifespan for the detector. Metal Detectors are built to be lightweight, compact and convenient so that they can be used in almost any terrain. However, it's critically important to protect the search coil on your machine as this is really its most important component - if the search coil doesn't operate effectively the whole metal detecting circuit is useless.

When you use your machine, the search coil receives and sends signals regarding the types of materials the metal detector is passing over. Since the coil is at the heart of the action, it also unfortunately gets dirt accumulated on it over time and regular use. The search coil does come with a separate cover, but this is usually not effective in adequately protecting the search coil.

If your search coil becomes too dirty, you may even get false-positive signals or even worse, you might not be able to get any readings at all!

Here are some steps to help prevent this kind of problem from occurring by sealing in your search coil permanently with a waterproof bonding agent or otherwise known as a silicone sealant:

By applying a waterproof silicone sealant you will not only prevent dirt from clogging your search coil but you will also protect the sensitive search coil from the usual wear and tear that is associated with metal detecting. This will ensure a longer life span for your metal detector. In addition, the silicone sealant also protects the metal from temperature changes which can also be destructive.

1. First you must remove the coil cover or coil plate. When you have removed the cover, clean the metal thoroughly to remove dirt and grease. A cloth moistened with ethanol (or any non-corrosive solvent) is ideal for this job.

2. Once your coil plate and the search coil are spotlessly clean, you need to re-attach the coil plate.

3. Wear a protective mask (to prevent you from inhaling the fumes) and perform the task of sealing in a well-ventilated area. Ensure that your cover and coil are very clean as any dirt or grease will mean that the silicone sealant will not bond adequately to the metal.

4. Cut a small portion off the tip of the applicator nozzle of the sealant. The hole in the nozzle should be about one-eighth of an inch in size. Screw on the applicator nozzle as directed on the sealant container.

5. Apply a small amount on all the tiny spaces between the coil and coil cover. Don't apply too much because the sealant will not adhere well to the metal. Remove any excess silicone sealant.

6. Check your work and apply a small amount on each area that is still showing a bit of space where dirt and grease can clog the coil. Let the silicone sealant cure for 24 to 48 hours.

Now you are ready to go out and hunt for treasure and be assured that your machine will remain clean and operational for much longer.

Ken Rowsby is a passionate treasure hunter. If you'd like more great tips on metal detecting [] then please visit []

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