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   Detectors, Walk Through Metal

Metal detectors use electromagnetic induction to detect metal. Uses include demining (the detection of land mines), the detection of weapons such as knives and guns, especially at airports, geophysical prospecting, archaeology and 'treasure hunting'. Metal detectors are also used to detect foreign bodies in food, and in the construction industry to detect steel reinforcing bars in concrete and pipes and wires buried in walls and floors.

In its simplest form, a metal detector consists of an oscillator producing an alternating current that passes through a coil producing an alternating magnetic field. If a piece of metal, which is electrically conductive, is close to the coil eddy currents will be induced in the metal, and this produces an alternating magnetic field of its own. If another coil is used to measure the magnetic field (acting as a magnetometer) the change in the magnetic field due to the metallic object can be detected.



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Fixed and programmable amplifiers - Frequency Devices

 

Books
Walk-through Metal Detectors For Use In Concealed Weapon And Contraband Detection: Nij Standard-0601.01
Nicholas G., Jr. Paulter and David G. Boyd

Walk-through metal detectors for use in concealed weapon and contraband detection (SuDoc J 28.15:0601.01)
Nicholas G. Paulter

Users' guide for hand-held and walk-through metal detectors (SuDoc J 28.8:D 48/2)
Nicholas G. Paulter

Shed the Wool Now! Transformation and Greater Consciousness Through the Chakra Clearing Elixirs
Alantha

Excerpt - page 134: "... for growth, for learning, for love multiply. Does this clarify? Metal Detectors OK, But Shield Elixirs From X-Ray Machines Me: When people have elixirs and walk through a metal detector or have them in luggage and go ..."
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Family Walk
Walk Thru the Bible

The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States (Authorized Edition)
National Commission on Terrorist Attacks

Excerpt - page 84: "... was considered the most important and obvious layer of security. Walk-through metal detectors and X-ray machines operated by trained screeners were employed to ..."
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Crucial Confrontations
Kerry Patterson, Joseph Grenny, Ron McMillan, and Al Switzler

Excerpt - page 20: "... managers don't filter out the low performers. New employees may walk through a metal detector to spot weapons, but they don't walk through a social ..."
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The Unofficial Guide to Washington, D.C. (Unofficial Guides)
Joe Surkiewicz and Eve Zibart

Excerpt - page 177: "... can have your picture taken; it D.C. tradition. Speeding through the Ubiquitous Metal Detectors Walk-through metal detectors staffed by no-nonsense guards are standard equipment in ..."
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The Search for Significance Student Edition
Robert S. McGee

Excerpt - page 69: "... BLAME AND CONDEMNATION "THE BLAME GAME" Do you walk through metal detectors when you enter your school? Many use scanning machines to ..."
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I Know This Much Is True (Oprah's Book Club)
Wally Lamb

Excerpt - page 70: "... I thought he was done humiliating me, Robocop had me walk through the metal detector. The thing beeped and whistled and he had me fork ..."
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Undead and Unpopular
MaryJanice Davidson

Excerpt - page 175: "... up, and you guys don't even frisk him? Make him walk through a metal detector? Something?" "We knew he was carrying. Mostly because he's a/- ..."
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Gone for Good
Harlan Coben

Excerpt - page 239: "... but alas, there was a security checkpoint. We had to walk through a metal detector. My keys set it off. I emptied my pockets. Now ..."
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Lost in a Good Book (Thursday Next Novels (Penguin Books))
Jasper Fforde

Excerpt - page 331: "... of the room was a doorway a little like a walk-through metal detector; it was tightly wrapped with thousands of yards of fine ..."
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From Beirut to Jerusalem: Revised Edition
Thomas Friedman

Excerpt - page 1: "... ended, with a bang. When we got in line to walk through the metal detector at our boarding gate, we found ourselves standing behind three ..."
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Where God Was Born: A Journey by Land to the Roots of Religion
Bruce Feiler

Excerpt - page 240: "... Bremer's office was located in Saddam's former reception room. A walk-through metal detector stood in front of the entrance, followed by two men ..."
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Terror in the Name of God: Why Religious Militants Kill
Jessica Stern

Excerpt - page 174: "... The guards inspect my identification cards and instruct me to walk through a metal detector. They direct me to walk, alone, to the noncontact visiting ..."
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Wiseguy
Nicholas Pileggi

Excerpt - page 180: "... body. The guards would search our bags and make us walk through the metal detectors, looking for knives and guns, but that's all they did. ..."
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Couldn't Keep It to Myself: Wally Lamb and the Women of York Correctional Institution (Testimonies from our Imprisoned Sisters)
Wally Lamb

Excerpt - page 3: "... main gate, hang your laminated badge on your shirt pocket, walk through a metal detector, then pass through a series of ten doors, some of ..."
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Chicken Soup for the Prisoner's Soul: 101 Stories to Open the Heart and Rekindle the Spirit of Hope, Healing and Forgiveness (Chicken Soup for the Soul)
Jack Canfield, Mark Victor Hansen, and Tom Lagana

Excerpt - page 182: "... There an officer told us to remove our shoes and walk through the metal detector. Tom's belt set it off, which he promptly removed. We ..."
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Caught Stealing: A Novel
Charlie Huston

Excerpt - page 64: "... set the hag on the conveyor and watch it slide through. I walk through the metal detector and set off no alarms. I don't sweat, I don't ..."
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Beyond Fear
Bruce Schneier

Excerpt - page 247: "... every piece of carry-on luggage and forcing every passenger to walk through a metal detector is worth the trade-offs only because airplanes are a higher-profile ..."
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The Talbot Odyssey
Nelson DeMille

Excerpt - page 105: "... to the right, and he waited his turn at a walk-through metal detector, then passed through under the scrutiny of Secret Service men. ..."
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Betrayal of Trust: The Collapse of Global Public Health
Laurie Garrett

Excerpt - page 146: "... they enter the building, then show their security passes and walk through metal detectors. There is little chatter or animation among the grim-faced nuclear ..."
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Executive Orders (Jack Ryan Novels)
Tom Clancy

Excerpt - page 27: "... the first time he hadn't had to show ID and walk through the metal detectors -more properly, he did walk straight through one from force ..."
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A Man in Full
Tom Wolfe

Excerpt - page 41: "... had not had to stand in line at an airport, walk through a metal detector, or utter his name to someone at a counter for ..."
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The Cardinal of the Kremlin (Jack Ryan Novels)
Tom Clancy

Excerpt - page 105: "... knew the routine well enough: show the guard the pass, walk through the metal detector, then down the corridor filled with state flags, past the ..."
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Please Kill Me: The Uncensored Oral History of Punk
Legs McNeil and Gillian McCain

Excerpt - page 354: "... the dope in the cuff of her pants. Then she'd walk through the metal detector again. The alarm wouldn't go off, and they wouldn't search ..."
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Tom Clancy's Splinter Cell
David Michaels

Excerpt - page 142: "... though, I reach into the Osprey and pull out a metal detection wand. It's like the thing they use at airports to wave around your armpits and between your legs if you happen to beep when you walk through the metal detector. As I continue down the aisle, I wave the detector ..."
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Angelina Jolie's: Notes from My Travels
Angelina Jolie

Excerpt - page 33: "... put the swab in a computer. I also had to walk through a metal detector. Once I was inside, everyone was very friendly. We discussed ..."
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Windows Server 2003 for Dummies
Ed Tittel and James Michael Stewart

Excerpt - page 314: "... a notebook and its owner are often separated - the metal detector. All it takes is a few moments of delay while waiting to walk through the metal detector after you've placed the notebook on the ..."
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The Hot House: Life Inside Leavenworth Prison
Pete Earley

Excerpt - page 330: "... a popular veteran guard who was in charge of the metal detector in the east prison yard, between the main penitentiary and prison industries. Each inmate was required to walk through the metal detector when he went to work each day, ..."
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Doctor Dealer: The Rise and Fall of an All-American Boy and His Multimillion-Dollar Cocaine Empire
Mark Bowden

Excerpt - page 83: "... Matt would pass his luggage through the X-ray machine and walk through the metal detector. Then Larry and Ken would go through. They then went ..."
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The Whole Pregnancy Handbook: An Obstetrician's Guide to Integrating Conventional and Alternative Medicine Before, During, and After Pregnancy
Joel Evans and Robin Aronson

Excerpt - page 319: "... in airports and hotels. Also, whenever I was about to walk through the metal detector, I would take a minute to collect myself and imagine ..."
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And Still We Rise: The Trials and Triumphs of Twelve Gifted Inner-City Students
Miles Corwin

Excerpt - page 218: "... and swaying in the wind. Olivia lines up by the metal detector at the door. She empties her purse on the luggage X-ray machine and walks through the metal detector. After she buys a cup of coffee ..."
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Fit for Life: Not Fat for Life
Harvey Diamond

Excerpt - page 276: "... to see if we brought gum to school; today they walk through metal detectors to make sure they don't bring knives and guns. I ..."
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Behind Bars: Surviving Prison
Jeffrey Ian Ross and Stephen C. Richards

Excerpt - page 177: "... They do little more than control the movement of convicts through the institution, directing them to enter or exit cells, stand in line, or walk through metal detectors. It's time to rethink how correctional facilities are run. For ..."
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