Hickey - Metal Detecting Concise Guide: A Guide for Beginners To Metal Detecting Concepts with Best Tips & Tricks to Get You on the Right Way of Treasure Hunting

Metal Detecting

Concise Guide

A Guide for Beginners To Metal Detecting Concepts with Best Tips & Tricks to Get You on the Right Way of Treasure Hunting

Donald

Hickey

Copyright 2020 Donald Hickey

All rights reserved.

It is not legal to reproduce, duplicate, or transmit any part of this document by either electronic means or in printed format. Recording of this publication is strictly prohibited

Disclaimer

The information in this book is based on personal experience and anecdotal evidence. Although the author has made every attempt to achieve an accuracy of the information gathered in this book, they make no representation or warranties concerning the accuracy or completeness of the contents of this book. Your circumstances may not be suited to some illustrations in this book.

The author disclaims any liability arising directly or indirectly from the use of this book. Readers are encouraged to seek Medical. Accounting, legal, or professional help when required.

This guide is for informational purposes only, and the author does not accept any responsibilities for any liabilities resulting from the use of this information. While every attempt has been made to verify the information provided here, the author cannot assume any responsibility for errors, inaccuracies or omission.

Table of Contents

INTRODUCTION

Metal detectors are a very diverse subject, from their types to the models available on the market, and you can get confused, especially as a beginner. What do I do, where do I start, is this right? A lot of questions that need answers, and this is why I am here. We are going to discuss what metal detectors are, give you a few tips on how they work, talk about the best places to metal detect and talk about some of the rules that govern metal detecting and how metal detecting benefits you individually.

CHAPTER ONE

Metal Detectors

What are Metal Detectors?

The metal detector is a device used to detect as the name indicates-metal or the occurrence/presence of metal around. They are particularly used to find metals hidden within objects or objects such as treasure, coins, etc. that may be found underground. Metal detectors are usually units that are handheld and have a sensor probe that is swept over the ground or area in which the user suspects have metals they are looking for. When the sensor comes within the metal area, there is a change in tone in the headphones, or in some models, the needle moves on the indicator. The way the device works is that it gives more of the indication of distance, i.e., it changes tone going higher and higher. The needle goes higher as the metal detector gets closer to the metal in question. One other type of metal detectors you may be familiar with is the "walk-through" which is stationary and used in security searching and screening at important access points like, airports, prisons, and courthouses to find and detect weapons that have been concealed on a person's body without actually giving them a full body search. They are different types of metal detectors, which we will look into as we continue in this book; they include; Industrial, Pulse induction, beat-frequency oscillation, and very low-frequency metal detectors.

The most basic form of metal detectors has an oscillator that produces an alternate current that goes through a coil, which produces an alternating magnetic field. Assuming a piece of metal that can conduct electricity is around the coil, eddy currents will automatically be created or induced (inductive sensor) in said metal. This, in turn, creates its magnetic field. Now assuming another coil is then used to measure said magnetic field (that is a magnetometer), the resulting change around and within the magnetic field could then be detected and measured. It looks like a lot, but we will be looking at this further down the book. Industrial detectors were first invented in 1960 and were mostly used for mineral mining and other industrial uses. There can be used for locating land mines, weapons like knives and guns (mainly in airport security), geophysical mining, archaeology, and treasure hunting. Detectors are sometimes used to locate objects that don't belong in foods and also in the construction industry to locate metal strengthening bars in concrete and pipes and wires embedded in walls and floors. All metal detectors function in diverse ways, here's the way regarding the ones that are alike. Metal detectors have a coil of wire known as the transmitter coil (tied around the circular head at the bottom of the handle). There is a magnetic field formed around it when an electric current drift around the coil. While you move the metal detector all around a metal object, the atoms in the metals are affected by the moving magnetic field. This alters the manner of movement of electrons- these are little particles that rotate around atoms. If there is a moving magnetic field inside the metal, this always says to us that that we should make sure there is an electric current moving there also. This also means the detector induces an electrical current in the metal. But there is also another intriguing thing we learn from this: a little magnetism is formed when electricity moves over a little metal. Another magnetic field is formed around the metal because of the magnetic field that comes from the metal detector. The detector only detects the second magnetic field around the metal. There is a circuit in the metal detectors that contains a loudspeaker and has another coil of wire in its head- called the receiver coil. When you move the detector over a metal, the magnetic field formed due to the metal pieces through the coil. Electricity flows through metal if you pass it through a magnetic field, that's how a generator works. The Metal detector then starts to beep or indicate with its pointer; this means you have found something. And as you move the metal detector closer to the source of the metal, the stronger the magnetic field becomes around it. This forms in the transmitter coil and is then transferred to the receiver coil. The more you move towards the metal, the louder the tone.

Uses of metal detectors

Metal detectors are commonly used in archaeology with the very first documented use by military historian Don Rickey in 1958, who was using one to detect the firing lines in Little Big Horn. That being said, archaeologists object to the use of metal detectors by "artifact searchers" or "site looters" whose actions destroy historical sites. The major issue with the use of metal detectors in historical sites or hobbyists who discover objects of archaeological benefit is that the context in which the object was found is lost, and no comprehensive investigation of its surroundings is carried out. A metal detector hobbyist may not be aware of the importance of artifacts outside of known sites.

Throughout the pharmaceutical, food, beverage, clothing, fabric, plastics, chemicals, timber, mining, and packaging industries, industrial metal detectors are used. Food contamination by metal shards from broken processing machines during the production system is a major safety risk for the food industry. Metal detectors are commonly used and incorporated into the production line for this purpose. The current practice in clothing or textile industry is to apply metal detection after the clothing is fully sewn and before clothing is packed, to test if there's any metal contamination (needle, broken needle, etc.) in clothing.