141. How Metal Detectors Work Read this BEFORE you buy a metal detector. metal detectors are fascinationmachines. Many of the people who use them are just as enthusiastic about http://www.gi.alaska.edu/~jesse/treasure/misc/howdetector.html

How Metal Detectors Work Introduction Metal detectors are fascination machines. Many of the people who use them are just as enthusiastic about extolling the virtues of their favorite metal detector as they are about setting off in search of buried treasure. Those of us who design and build these instruments for a living listen carefully when one of our customers talks about his or her experience in the field, because this is the primary means by which we determine how well we are doing our jobs, and what sort of things we need to do better. Sometimes though, communication is difficult. Almost as though we and our customers speak different languages. Which in a sense, we do. The purpose of this page is to try to narrow that communication gap a little. And, to resolve some of that "typical curiosity" metal detector operators have regarding what is going on inside their instruments. Is it necessary to know how a metal detector works in order to use it effectively? Absolutely not. Will knowing how it works help someone to use it more effectively in the future? Quite possibly yes, but only with persistence and practice. The best metal detector available is still only as good as the person using it. Transmitter Inside the metal detector's loop (sometimes called a search head, coil, antenna, etc.) is a coil of wire called the transmit coil. Electronic current is driven through the coil to create an electromagnetic field. The direction of the current flow is reversed several thousand times every second; the transmit frequency "operating frequency" refers to the number of times per second that the current flow goes from clockwise to counterclockwise and back to clockwise again.

142. Accurate Locators - Original Metal Detectors Website Offers a variety of detectors, including metal and ground penetrating radar.Products, prices, ordering, articles, and company profile. http://www.accuratelocators.com/

HOME PRODUCTS SUPPORT ABOUT Metal Detectors, Ground Penetrating Radar, U nderground S urveyor A Call Toll Free: (866)369-1975 International 01-541-326-4169 HOME LIVE SHOWROOM CAM IMAGERS GPR ... Accurate Locators In Las Vegas (Click for Details) Accurate Locators Site News Fall Clearance Sale : Save $1000-$3000 on selected items while supply lasts. Click here for our specials. New Imaging Packages : Our Underground Surveyor Packages have been improved. Our Discovery and Imager units now come with our new Pinpointer for precision target locating and depth estimation. Accurate Locators Now Accepting GSA Contracts : Accurate Locators is proud to offer GSA contracts for many of our products. Eligible products are marked by the GSA Logo. Updated 05.14.2005

143. TSEEP Technology Describes soil gas monitoring for detecting organic compounds and heavy metals in the subsurface, allowing rapid assessment of industrial sites. http://www.bodmer.terraplan.ch

Principle References Applications Technology ... Terraplan welcome to BODMER TERRAPLAN TSEEP a method for underground pollution detection English Deutsch

144. C.Scope International LTD - Metal Detectors, Utility Locators metal Detectors, UScan precision locators, pipe and cable tracing solutions forcontractors, cable avoidance tools, Security metal Detectors. http://www.cscope.co.uk/

Treasure Hunting Metal Detectors Utility Tracing Products Security Metal Detectors WELCOME TO C.SCOPE INTERNATIONAL LTD. Nobody understands metal detecting like C.Scope. We've been making top performing, world beating metal detectors in Britain for more than 25 years. We have an exciting new website under developement for 2005! C.Scope International LTD

145. Essex Metal Detectors. Manufacturers, Retailers, And Users Of Quality Metal Dete Essex metal detectors. Manufacturers, retailers, and users of quality metaldetectors since 1972. Site includes excellent diy projects ideal for school or http://home.clara.net/saxons/

24 Perry Way Aveley, South Ockendon, Essex, RM15 4RD, England Telephone 01708 866859 Email............Saxons#Clara.net # = @ MANUFACTURERS, RETAILERS, AND USERS OF QUALITY METAL DETECTORS SINCE 1972 No Java, Cookies, or other invasive technology used on this website ========== GREEN Links below are Free stuff RED Links are for items for sale Saxon SM35 motion discriminator Saxon SM45 motion discriminator Saxon X-1 Ultra Depth Analytical Detector Build your own metal detector ... Metal detector patents This page has been accessed this month

146. Metal Detectors How To Test At first sight of it you would think that testing a metal detector would be If selecting coins for metal detector tests it is easy to spot the steel http://home.clara.net/saxons/test.htm

METAL DETECTORS HOW TO TEST At first sight of it you would think that testing a metal detector would be quite a simple task. Just dig a few holes bury a few coins and see how deep you can detect them. In practice its not quite so simple or straight forward. Books, Magazines, Field tests, and other publications tend to steer clear of any serious tests, preferring to quote in air tests that are just about useless. Actual in ground performance usually falls far short of advertised depths. So called independent field testers are usually under pressure from editors or on a bung from manufacturers to exaggerate depths. You may be surprised to learn that many of the modern coins being minted today are actually made of steel. A steel blank is struck and then coated with a very thin layer of copper. Probably three quarters of the UK 1p and 2p copper coins have now been replaced with these steel clones. If selecting coins for metal detector tests it is easy to spot the steel coins by using a magnet. The pure copper 1p and 2p are ideal for detector testing, and will give about the best depth you will get on coins. The older English coins such as the 1 penny and 1/2 penny are also suitable for testing if you have them. Using a magnet to separate out steel coins An alternative method for testing on single coins is to make a set of testing plugs as described below. The basic idea is that a bullet shaped plug that contains a coin, made from hard wood, Nylon, or other engineering plastic is banged in to the ground with a hammer and driving rod to a particular depth. The ground needs to be not to hard for the plugs to survive. After the plug can be retrieved by being pulled out of the ground by a strong nylon cord, to be used again. The plugs themselves can be roughly made from hardwood, or machined from some sort of engineering grade of plastic or Nylon.

147. Kellyco Metal Detector Superstore - Metal Detectors - Accessories - Fisher - Gar metal detectors and metal detector for Whites Garrett Minelab Bounty Hunter andMore. Kellyco Detector Superstore is the largest metal detector distrubutor http://www.kellycodetectors.com/indexmain.htm

M-F 9am-6pm Sat. 9am-5pm. After 6pm Call Toll Free 1-800-327-9697 Phones Now Open at 9am To Kellyco HOME September 23, 2005 1085 Belle Ave. Winter Springs, Florida 32708 Search For: [Search Tips] International HOME By Manufacturer White's Garrett Minelab Fisher Bounty Hunter Titan 1st Texas Predator MP Detectors Cobra Metal Detectors Wilson Electronics Discovery Electronic JW Fishers Nautilus Hot Head Magellan Scanmaster GPL Automax Pro II Locators Pulse Star Laserscan Lorenz Night Owl Optics Night Vision Anderson Rods Aurora Elect. Gold Probes SeaView Keene Engineering All Manufacturers All Metal Detectors Detector Accessories Books, Maps Accessories Accusound Phones Battery Systems Beach/Water Access. Books Carry Bags Coil Covers Coin Books Coin Items Compasses Digging Tools/Kits Display Cases Dust Covers Gold Panning Gold Recovery Gold Test Kits GPS Books Hard Carrying Cases Headphones Hoes/Picks Jewelry Cleaners Knee Pads Loop Supports Magnets Night Vision Picks/Hoes Pinpointers Pocket Knives Pouches Scoops - Long Scoops - Short Searchcoils Shovels Tumblers Videos Water/Beach Access.

148. DetectorPro Professional Underwater Metal Detectors And Accessories Why Buy a Headhunter metal Detector? They are fun! They are lightweight! Convertible to powerful fullsize Pulse metal Detector with optional rods and http://www.detectorpro.com/

Treasure Hunter's Mouse Pads ATTENTION! NEW PRODUCTS ADDED! The Home of Innovative Treasure Hunting Concepts Why Buy a Headhunter Metal Detector? They are fun! They are lightweight! They are easy to use! They can be used on land and sea! They find Treasures! Small, compact, and easy to travel with! Excellent depth penetration! Detect local swimming holes for lost coins and jewelry! Hunt the outer areas of shipwrecks for lost objects! Detect around old docks and boat slips! Hunt old bays where boats have moored for years! Detect rivers where boats are easily capsized! Hunt where old resorts and hotels were near water! Hunt old picnic groves for rare coins! Wade into the water up to 6 feet where most jewelry is found! Hunt in the rain and have the beach to yourself! Doubles as a great lightweight detector used in competition hunting! We have models for every hunting environment and application! Why Buy a DetectorPro Headphones?

149. Crawfords Metal Detectors - The Most Comprehensive Range Of High Quality And Val Supplies a broad range of machines, accessories, books and maps. http://www.crawfordsmd.co.uk/

Please Select Bounty Hunter C Scope Fisher Garrett Minelab Other Manufacturers Security Metal Detectors Tesoro/Laser TROY Viking Whites XP Please Select We aim to bring you the most comprehensive range of high quality and value for money metal detectors and accessories on the web ... plus excellent service and the convenience of online shopping. Crawfordsmd.co.uk is the online superstore for Crawfords Metal Detectors, one of the largest independent metal detecting dealers in the UK and Europe. This site allows you to browse goods, order and have them delivered direct to your door. IMPORTANT ANNOUNCEMENT - WE ARE MOVING TO NEW PREMISES On 3rd October 2005 we move to new, larger premises. We will be moving over the weekend so normal business will not be affected. Click info for further details. Code read on for more Offer details: As a part of continued commitment to offering our customers the very best service we are moving to larger premises. For more details click INFO then click IMPORTANT ANNOUNCEMENT at bottom of page. Beginners Guide to Metal Detecting Just started detecting? Thinking of becoming a detectorist?THIS BOOK IS FOR YOU! Get ahead start with this New Book wrtten by experts.

150. Henderson Metal Detector Sales Henderson metal Detector Sales metal detectors and metal detector for BountyHunter, Tesoro, Minelab and More. We have all major metal detector brands in http://www.buyametaldetector.com/

Metal Detectors About Us Contact Us FAQ ... Specials Henderson Metal Detectors is a Tesoro gold star dealer. We also carry DetectorPro, Bounty Hunter (such as the Land Star and Sharp Shooter ), Garrett (including the GTI-2500 and Treasure Ace 150 ) and other brands of metal detectors for hobby and industry. All of our metal detectors and accessories are sold below the list price, with free shipping anywhere in the US. Order with confidence using your credit card on our secure ordering form. Or stop by our showroom for a demonstration of our state-of-the-art metal detectors. If you are a first time buyer, we welcome you to the world of metal detecting and hope that one of our detectors will make your dreams become reality. Happy Treasure hunting!! -Clarence (Bill) Henderson- Incredible finds straight from a a number of fields in England! See Pics, read stories and grab your share of history! Buy a metal detector today! Don't miss out on our Holiday Specials , filled with detectors to suit all your needs For A Limited Time!

151. Gales Metal Detectors : Welcome To Treasure Hunting Gales metal Detector Sales, serving Canadian Treasure Hunting needs Coast To Coast. http://www.galesmetaldetectors.com/

Best Viewed at 800 X 600 display settings Southern Ontario's Largest Metal Detecting Dealership FREE DIGGER AND TRASH POUCH AND ONE BACK ISSUE OF EASTERN WESTERN TREASURES WITH EVERY PURCHASE OF A NEW METAL DETECTOR! Instant Purchase Now Available At Gales Metal Detectors If You Want It Now, You Can Buy It Now! All prices in Canadian Dollars Our Website Pricing Includes All Applicable Taxes Well as we get ready for another digging season, we hope you will have a bountiful year! But, if it's time to upgrade or just become involved with metal detecting or getting back into the 'swing' of things once more, let us offer you our expert advice in helping you to choose the equipment you'll need to make deeper, faster and more rewarding finds. Let Gale's Metal Detectors be your one-stop North American Shop for all your metal detecting needs, from metal detectors, to coils and even knee pads. We carry most of the major manufacturer's models. Whether you're an amateur or a pro, we have the metal detector to suit you. We also have an excellent line of accessories and books. What a great hobby for the beginner or retiree! E-mail us for details on the brands we carry!

152. Welcome To Metaldetector.com Discount metal detectors. How to choose the best detector article. Retail storelocator. Dealerships available. http://www.metaldetector.com/

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153. Celtic Metal Detectors - Professional, Easy To Use - UK Manufacturers And Suppli Celtic metal detectors security hand-held metal detectors, professional, easyto use detectors, books and accessories at low prices, treasure hunting http://www.celticmd.co.uk/

metal detectors Need more info? e-mail us - click here Tel Fax: 01341 430249 Write: Bryn Golygfa Bontddu Dolgellau Wales Products News Stockists Info ... Services WELCOME professional lightweight user friendly metal detectors Products News Stockists Info ... Services

154. Metal Detector News, Reviews And Ratings metal Detector reviews by real people. Read what everyone uses and why. Which isthe best gold detector? Find out which are the most popular metal http://metaldetectorreviews.net/

Metal Detector Reviews and Field Tests from real Hunters Welcome to Metal Detector Reviews Metal Detecting is an excellent hobby and pastime for the whole family. This website is here to help you select the right detector based on the experience of other people like you. Site News The year 2004 is over and we have seen the manufacturers come out with some great models. To keep up with the growing market and to satisfy our site visitors, we have expanded our database of metal detectors. To make our site even better we are planning to add more categories related to metal detecting, such as coils, digging tools and more. We appreciate all the support of those who have submitted their reviews and shared their honest opinions for others to read. If you would like to suggest a new category or have some ideas, please e-mail us. Latest Detectors Brand new from Minelab. Minelab - Quattro MP Seems like Minelab just released their new Explorer II, they just don't stop developing! Here comes new Quattro MP! New Detector with new technology called FBS - The Full Band Spectrum. What does this mean to us? Hopefully better depth and performance then the previous models. If you are one of the first owners of this detector, please take a minute and share your thoughts with all of us.

155. Metal Detectors, Gold Prospecting Equipment Sales, Belda's Fisher metal detectors, Minelab metal detectors, Bounty Hunter metal detectors,Troy metal detectors, Belda s metal detectors , gold prospecting equipment. http://www.goldbummin.com/

var TlxPgNm='index'; metal detectors, gold prospecting equipment sales, BELDA'S Fisher metal detectors Minelab ... detectors Fisher, Minelab, Troy, Bounty Hunter and metal detectors for gold prospecting, treasure hunting, relic and coin. and Gold prospecting equipment including Fine Recovery sluice boxes and backpack dredges, Goldstar drywashers and rockers, Gold Buddy drywashers, Desert Fox automatic gold pans, along with a full range of accessory equipment, including GPAA kits , magnifiers, super magnets, picks, trowels, gold pans, scales, books, maps, gold prospecting videos, pinpointers and the Falcon Gold probe. Proline Mining Equipment just in! NO sales tax in Oregon. GOLD AND TREASURE IS WITHIN YOUR GRASP! There are alot of parks, recreating areas and historical areas everywhere, many have found items that pay for their detector. Are you interested in a gold detector, treasure hunting detector, coin detector, relic detector, multi- purpose detector, sepecialized detector, or a security detector? Call Mark today for a dealer with over 10 years experience. Belda's is an authorized dealer for White's, Minelab, Fisher, Troy, Bounty Hunter metal detectors.

156. Gold Prospecting Tools Diamond Testers Capture View Binoculars Sluice Boxes Gold prospecting tools diamond testers UV lights gold prospecting suppliesbinoculars capture view binoculars sluice boxes sluice boxes for gold prospecting http://www.metallocators.com/

Go With The Best For Less!! MISSION: Finnell's treasure hunting and prospecting business was established in 1987, and is, at the present time, one of the few such business offering such a wide variety of equipment and supplies related to the hobbies of metal detecting and prospecting all at discount prices. We are constantly in the process of updating and expanding our on-line metal detector equipment and on-line prospecting equipment inventory. If you are in need of items not shown in our on-line catalog, chances are, one of our distributors will have it available and be able to "drop-ship" it to you, usually in less than 10 days from the time you place your order. TOLL-FREE order line: Phone: (970) 217-1148 Fax: (970) 223-2150 Email: In Addition to The Following Credit Cards, We Also Accept

157. Metal Detector - Wikipedia, The Free Encyclopedia metal detector Wikipedia, the free encyclopediaA US Army soldier uses a metal detector to search for weapons and ammunition in In 1881, Alexander Graham Bell constructed a crude metal detector in an http://en.wikipedia.org/wiki/Metal_detector

Metal detector From Wikipedia, the free encyclopedia. A U.S. Army soldier uses a metal detector to search for weapons and ammunition in Iraq Metal detectors use electromagnetic induction to detect metal In 1881, Alexander Graham Bell constructed a crude metal detector in an attempt to find an assassin's bullet in President James Garfield Gerhard Fischar patented a portable version in 1931. Upright "archway" detectors are used at entrances to secured buildings, such as courthouses or airports, to detect metallic weapons which may be brought in. Small portable "wand" detectors are used by security staff to frisk persons for the same. Larger portable metal detectors are used by treasure hunters to locate metallic items, such as jewelry or coins, buried shallowly underground. There are three types of metal detectors: beat frequency oscillator, induction balance, and pulse induction. In a beat frequency oscillator detector, a coil is used as an inductor in an oscillator , whose frequency changes when metal causes its inductance to change. Another oscillator produces a close frequency, and audible beats between them signal metal. In an induction balance detector, there are two coils, usually gibbous with about 10% overlap, and a sine wave is transmitted with one coil and received with the other. The coils are adjusted so that there is no signal in the receive coil when there is no metal nearby.

158. Metal Detectors - Treasure Hunting Supplies metal detectors and treasure hunting supplies by authorized dealer of Fisher,Garrett, Tesoro, Bounty Hunter Minelab. http://www.upstatedetectors.com/

Metal Detectors - Treasure Hunting Supplies UNITED STATES SALES ONLY Fisher Minelab Garrett Shadow x5 DetectorPro Tesoro Bounty Hunter Security ... Detectors Treasure Hunting Accessories Beach Scoops Carry Bags Tumblers Electronic Coin Probes ... Headphones Misc: Links Customer Finds Great Selection of Call Upstate - We give you more choices When purchasing a detector that has our selling price of $300 or more Get a 250 gram gold scale that sells for $69.99 Free you pay only $9.99 shipping and handling See this scale on our access. page here Or Choose the regular package deal noted on each detector.... Ph 518-393-0624 We do not sell refurbished, demos, seconds, or repaired detectors as new detectors. We only sell new, first quality detectors. Trade-Ins Are Welcome We will give you Top Value for your used machine towards any new one. If you are not satisfied with your existing equipment or are ready for something new, then call us. We believe we can give you the highest trade-in value anywhere. Call now 518-393-0624 for a phone estimate (based upon used mint condition pricing). Actual value will be given after inspection according to condition and grade of your equipment and accessories.

159. The Original Dixie Metal Detectors Middle Tennessee s only Minelab Dealer ,Tesoro , Sun Ray, DetectorPro, TroyShadow, Garrett detectors and Security Equipment, Security Wands and WalkThru http://www.dixie-metal-detectors.com/

s d ASK ABOUT OUR SPECIALS AND FREE SHIPPING!! DIXIE METAL DETECTORS - MADISON, TN. Welcome! "PRODUCTS AND FIRST CLASS SERVICE FOR DISCRIMINATI NG DETECTORISTS"! PROFESSIONAL SERVICE SINCE 1985 Dixie Metal Detectors (TM) is located in Madison, Tennessee. Just North of Nashville. We carry top of the line metal detecting equipment for the professional as well as the hobbiest. Dixie Metal Detectors (TM) (TM) , Madison, Tennessee. VISIT US AT WWW.FINDMALL.COM (Relic Forum) PAYMENT OPTIONS: We accept Visa, MasterCard, American Express and Discover cards through PayPal, a FREE, secure/insured online service. Follow the easy "sign up" instructions by clicking on any PayPal button on any page of our website. All online purchases are are safe and insured , and now you do not need a membership! This is a great new benefit and using PayPal is free to you! You can even make money by referring your friends! New customers can now get verified with PayPal to increase their buying power! We also offer VeriSign Services which accepts Master Card and Visa. We use

160. Metal Detectors Direct - Metal Detector Suppliers Since 1968. Visit www.joanallen.co.uk for the latest information on metal detectors fieldtest reports, special offers and secure ordering with next day delivery. http://www.joanallen.co.uk/

Order metal detectors securely online from the UK's leading metal detecting specialist. Free next day delivery on most metal detectors. Over 50 detector models to choose between. Interest free credit available. We've been the leading UK metal detector supplier since 1968. Visit www.joanallen.co.uk for the latest information on metal detectors : field test reports, special offers and secure ordering with next day UK delivery. Treasure hunting Treasure hunting - the world's most rewarding hobby! Now you too can find hidden treasure with a metal detector. Joan Allen Electronics Ltd is pleased to bring you Europe's premier specialist metal detecting web site. Metal detectors You will find information here about all the leading brands and accessories and learn about the latest introductions and special offers. You can order by phone or securely online. But don't forget that Joan Allen is not run by computers but by real people. We are here to answer your queries, offer advice and, if you prefer the personal approach, take your orders: contact us by email, telephone, fax, letter or in person. We have a well-stocked detector showroom in Biggin Hill, Kent, U.K.

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