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Brought to you by Casanova's Metal Detector Center

Understanding The Function Of The Searchcoil Is Important For Optimal Metal Detection.

The common searchcoil used with a metal detector forms an electro-magnetic field both above and below its surface. When metal comes into this field, it becomes energized by the magnetic force and in-turn produces a magnetic field. If this field is strong enough, and if the receiving wire-coil inside the searchcoil is sensitive enough, this magnetic field will generates a tiny current (signal) in the searchcoil's receiving wire-coil.

The metal detector's main control box is responsible for:

• Producing a current through the searchcoil in order to generate a magnetic field from the searchcoil's wire-coil.

• Receive any electrical signal from the receiving wire-coil inside the searchcoil.

• Process the signal received.

• Indicate to the user a metal object is inside the immediate magnetic field being produced.

The searchcoil is responsible for

• Producing the magnetic field.

• Forming the shape of the magnetic field, thereby creating the search pattern..

• Receiving a detected object's magnetic field signal.

Searchcoils are basic in function and the technology involves shaping the search pattern. Most searchcoils are round. The size of the searchcoil affects the depth a target can be detected, and effects the sensitivity to a specific target.

Searchcoils are made in different sizes which offers a range of detection field patterns for different search criteria. Presently, there are two searchcoil technologies being marketed; the 'DD' or 'Double D' searchcoil and 'Monoloop' or 'mono searchcoil'.

By changing the size and shape of the searchcoil, the metal detector can become more versatile for changing conditions in the field, and its use capabilities.

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The Searchcoil Is The Most Vital Part of a Metal Detector

The searchcoil is the part attached to the control housing that produces the search pattern of the machine.  The searchcoil contains a transmitter and receiver antenna, which provides the means to produce the magnetic pattern used by the detector to sense metal objects.

Searchcoils are available in several shapes and sizes to meet a variety of hunting needs. Generally speaking, small searchcoils are designed to detect small shallow objects, while large searchcoils are used to find large, deeply buried objects.

Searchcoil can range in size from 3 to 24 inches in diameter. An all-purpose detector is usually equipped with an 8-inch or 9-inch searchcoil, practical for scanning parks, playgrounds, beaches and other popular coin-hunting locations.

Understanding the Searchcoil, Yields Your Best Results.....

• Detect more targets through the complete understanding of the physics evolved.

• The manufacturers of metal detectors design and build searchcoils to be tuned to a specific transmitter circuit used in a specific detector model. We high recommend you only use the specific searchcoil designed by and built by the original detector manufacturer. Anything else is entirely at your own risk or wasting your time detecting or worst, wrecking an expensive piece of electronic equipment. Be smart and enjoy your time with a quality built metal detector backed by a well established manufacturer.

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Qualifying the Information Source

Before you read all the wild claims and hype in the metal detecting market place. And before you listen to all those wild stories and the "know-it-all" types in the hobby, qualify the information source!

To give merit to the information presented, I offer the following qualifications. I have used metal detectors in hobby and professionally since at least 1968. When I was a young boy interested in electronics, science and two-way radio technology, I came upon the metal detector. I read many metal detecting books published by the leading technology manufacturers, watched manufacturer's  videos, and most importantly, I majored in science including electronics in school. Since 1968, I have had the privilege to use many of the metal detector models produced by all of the leading manufactures in the industry. I have had the privilege of being part of the metal detecting industry through our corporation, Casanova's, a full line authorized dealership for the major brands of metal detectors in the world.

With this understood, I offer you practical information you can use -

Mr. Gene Casanova, Equipment Specialist.