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For the hand-held metal detector, the generated energy is in the form of a magnetic field. The interaction of this magnetic field with certain types of objects in the region around the detector and the ability to detect this interaction are the basis of operation for hand-held metal detectors.
A hand held metal detector wand has two primary components, a transmitter coil that creates the electromagnetic field and a receiver coil that detects electromagnetism.
The detectors gather clues about the particles – including their speed, mass and charge – from which physicists can work out a particle`s identity. The process requires accelerators, powerful electromagnets, and layer upon layer of complex subdetectors.
Setting your metal detector to achieve the best sensitivity for your needs requires adjusting the frequency settings. Finding the right balance is challenging because low sensitivity settings won`t find contaminants, and high sensitivity settings will result in too many rejections.
All metal detectors need calibrating. Each manufacturer will tell you that at least one annual visit is necessary to keep the detector operating at its best.
A typical metal detector`s best frequency for coins jewelry and relics is between 5 kHz to 15 kHz. This is the range where you will find most metal detectors for general-purpose are tuned.
Typical minimum depth range from 25 to 30 cm underground. This range is obtained with very rough quick made coil (not optimized) using 10 cm diameter object. With optimizaed coil range of detection increase to more than 40 cm. The metal object detection is indicated by LED.
Most metal detectors can detect coins at an average maximum depth of 10 to 16 inches. Metal detectors transmit radio frequency signals from the search coil to locate the targets from the ground`s surface to a depth of over 20 feet for large deep treasures.
An industrial metal detector consists of four main components: the sensor, the control, the signal processor, and the output device. The sensor will react to the proximity of metal. The reaction of the sensor is transmitted to the filter, an electronic device that interprets the sensor signal.
Inductive proximity sensors can only detect metal targets. They do not detect non-metal targets such as plastic, wood, paper, and ceramic. Unlike photoelectric sensors, this allows a inductive proximity sensor to detect a metal object through opaque plastic.
Metal detectors create a magnetic field by using a brief pulse of electrical current. The magnetic field will be reflected back to the machine if there are any metal objects present, such as a watch or a belt buckle. The return signal is detected by the machine and a beeping noise is produced to alert the TSA agent.
A detector should be located within 10 feet of each bedroom door and there should be one near or over any attached garage. Each detector should be replaced every five to six years. CO detectors do not serve as smoke detectors and vice versa.
A metal detector is capable of detecting all types of metals. These metals are divided into two categories, the first is ferrous and the second is non-ferrous. Ferrous refers to any metal that is attracted to a magnet. Ferrous metals are the easiest to detect due to the fact that they have magnetic properties.
Metals such as iron, nickel and cobalt are detected by passive and active metal detectors. Other metals, such as copper, brass and aluminum, are detected only by active means.
Calibration is the determination of the correlation between an input and an output quantity. All measurement instruments, such as voltmeters, manometers, Vernier calipers, etc., must be calibrated to determine the variation of their reading from the absolute quantity.
Beyond moisture content, the temperature can have a significant impact on the detector`s function. A frozen product isn`t likely to cause disruptions because of limited conductivity. However, if the product begins to thaw, condensation can influence the coils` magnetic fields within the metal detectors.
Threshold frequency for a metal is `10^(15) Hz`.
Tuneable amplifier detectors: The transistor amplifier can be tuned electrically and thus can be made to respond to a narrow bandwidth at the bridge frequency. This detector can be used, over a frequency range of 1 kHz to 100 kHz.
Sensitivity is the measure of a metal detector`s ability to detect a specific type and size of metal contaminant. The better the sensitivity of the metal detector, the smaller the pieces of irregular-shaped metal it can detect.
Metals That Can`t Be Detected

Stainless steel has low magnetic permeability, which means it does not produce a signal strong enough to be detected. Other items that metal detectors won`t be able to locate include: Gemstones. Paper.

Range. The range of the sensor is the maximum and minimum values of applied parameter that can be measured. For example, a given pressure sensor may have a range of -400 to +400 mm Hg. Alternatively, the positive and negative ranges often are unequal.
„The sensing range of position sensors is the distance between the sensing face of the sensor and the approaching measurement object.
Metal detectors will work underwater and freshwater has very little effect on how they function (saltwater is another story). Additionally you can use a metal detector in the rain with no adverse effect on their functionality.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

I need a manual for bounty hunter quick draw 2 metal dector
ANSWER : You can download the full users manual at http://www.detecting.com/products/
here is the link to your quick draw II detector:
http://www.detecting.com/pdffiles/qdiiman.pdf
If you want to purchase a hard copy of the manual look on eBay under Bounty Hunter Manual cost is around $6.

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I need a manual for my bounty hunter metal detector
ANSWER : You can download the full users manual at http://www.kellycodetectors.com/pdf/manuals/pioneer505.pdfIf you want to purchase a hard copy of the manual look on eBay under Bounty Hunter Manual cost is around $6.

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I need the operators manual for a discriminator detector md-3013 metal detector
ANSWER : Http://weien.ecpush.com/

here is the supplier of this model..it is made in china

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I need a manual for a outdoor spirit metal detector md-m201
ANSWER : What kind of charger does the outdoor spitit metal dector use
model 201

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Precision Gold Metal Detector With Digital Display Set Up
ANSWER : Instruction manual for the precision gold metal detector: go to www.maplin .co.uk. then type in L24BK into the product search. the metal detector will come up.then go to bottom of page where it states “media” if you click here a pdf of the instruction manual will come up for download.
Paul

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How do I get an instructional manual for the awning on my RV?
ANSWER : Kindly download the manual from the following website

http://bryantrv.com/owners.html

thank you

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Procedure for operating m d 7030 metal detector. I left manual at home
ANSWER : Http://www.famoustrails.com/manuals/MD7030%20Manual.pdf

here is the link
Chadman

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