Mar04

Hand Held Metal Detector

Posted by admin on 03/04/12  ~  Posted in: Metal Detectors India  ~  Send feedback »

Hand Held Metal Detector

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Hand-held metal detectors are an integral part of the physical security screening process.
We have designed a unit that benefits security personnel as well as the person being scanned. Our unique angled design allows you to thoroughly scan an individual, while keeping your hand away from their body.

Additional Benefits

  • The circular opening assists in pinpointing metal objects
  • Comfortable handle for easy control and grip
  • Lightweight 260 g (9.3 oz.) with battery
  • Wrist strap

Detection

Detects all metals, both ferrous and non-ferrous.

Sensitivity

Three (3) sensitivity settings Detection performance

  • Level 1 : small handguns and knives
  • Level 2 : razor blades, handcuff keys
  • Level 3 : 22 caliber bullet, metal shanks

Operation

2-way push-button operation: On/Off

Battery

  • NiMH rechargeable battery or 9V alkaline battery
  • Low battery indicator, both visual and audible

Alarm

  • Audible and visual alarm indication
  • Optional Headset

Rugged Construction

High impact resistant ABS case

Safety

The SheiBan systems HHMD is safe for people with pacemakers and will not affect magnetic  recording media. The magnetic field strength of the SheiBan systems HHMD meets with the limits  set by international standards for human safety.

Warranty

Two (2) years

Mar04

Door Frame Metal Detector

Posted by admin on 03/04/12  ~  Posted in: Metal Detectors India  ~  Send feedback »

Door Frame Metal Detector

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This walk-through metal detector which uses advanced magnetic technology to accurately pinpoint the location, size, and number of concealed weapons, such as knives and guns Personal artifacts such as coins, keys or belt buckles will not set off the alarm. It offers superior performance for demanding high security applications.

This walk-through metal detector can be used in the factory, prison, court, exhibition hall, stadium and entertainment lieu, where the prohibited articles need to be checked for safety

Features

  • High ‘Q’ tuned resonant circuit
  • Lockable Single set control knob for initial setting with respect to immediate vicinity and environmental conditions
  • Linear sensitivity control knob for precise setting at desired levels
  • Three level visual indication of metal detection through 10mm LED
  • Bar graph display shows real time signal level strength
  • Audio alarm through Piezo-electric transducer with volume control on detection
  • Detect all metals even when concealed in Ferrite container

Specifications

  • Principle : Eddy current loss
  • Detection : All ferrous & non ferrous metals.
  • Power source : Operationable on 230 Volts AC ±15% & 12 Volt DC operation
  • Sensitivity : Low - Objects like Grenades. Medium - Objects like Pistol, Small Weapons. High - Objects like Watches, Keys & Coins
  • Control Unit : Built in
  • Ramp : Covered with synthetic carpet for long life
  • Colour : Light yellow
  • Passage : 1950mm x 750mm
  • Overall Dimensions : 2100mm x 825mm x 300mm
Mar04
Gravity Feed Metal Detector (GFMD

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Sheiban Systems Gravity Feed Metal Detection System has been designed to inspect free-flowing solids such as powder, granules & pellets. very compact design with fast acting electronics allow for installation in almost/every application.
Utilizing the latest in Digital Signal Processing technology, the Gravity Feed Metal Detection System delivers the highest level of metal detection to date. The advanced user-friendly interface allows quick and easy application set-up. A comprehensive, self-diagnostic system monitors the metal detectors performance for potential circuitry changes. It is also capable of sensing the speed and position of the reject gate. A multi-level password security system insures maximum performance by limiting access to critical settings

Mar04

Tablet Capsule Metal Detectors (TCMD)

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Keeping utmost care of WHO (WORLD HEALTH ORGANISATION) into considerations, we have designed an “ TABLET CAPSULE METAL DETECTOR (TCMD)” for pharmaceutical companies for highly sensitive detection of tramp metal.
Our TCMD machine is made of stainless steel and food grade material with stringent quality control.

We have provided reject mechanism with help ofelectricalsolenoid to avoid waste, clean, precise rejection of contaminated product.
For routine cleaning and product changeover, TCMD’s chute can be easily & quickly dismantled which is for high processing speeds and product change. The design of TCMD is so compact which is easily installed for flexiblility & efficient operation on the line before or after the deduster.
Advanced detection coil design combined with proven SheiBan systems Signature software delivers unrivalled detection performance and on-line stability enabling even the smallest contaminants to be detected and rejected from the product flow.

Features

  • Super speed reject for positive reject of contaminants
  • High sensitivity to all metal including the most difficult non-magnetic stainless steel
  • Quickly & Easily cleaned
  • Stainless steel finish for easy clean and hygienic design
  • To monitor the amount of contamination, Built in LED Bar Graph is provided
  • Solid state electronics provides better stability & reliability throughout the life
  • Auto balance for stability
  • Electronic modules is easily changed
Mar04

Super Search Metal Detector(SSMD)

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SheiBan systems SSMD are renowned for their superior accuracy, high-speed and ease-of-use.
SSMD are offered in a wide range of aperture sizes with a selection of construction options including painted aluminum, stainless steel, and mild steel structure. The rectangular aperture units are suited for integration with conveyor belts.

Fortress recommends utilizing its custom-designed Vector conveyor system which is built specifically for the metal detection application and optimizes the performance of the detector. 
When combined with material handling systems or conveyors, product inspection can be fully automated.
Available with casing for complete waterproof protection, the SSMD is the most practical and functional solution on the production lines, day after day.
The SSMD model is the model of choice for customers demanding the highest sensitivity and trouble free operation.

 

Advantages

  • Detection of both magnetic and non-magnetic metals
  • High immunity to environmental interference
  • Installed without cutting conveyor belt
  • Very high reliability
  • SSMD is a model for universal use, with a tunnel that can be opened if the conveyor belt can not be interrupted for installation purposes
  • High level of electronic and mechanical reliability
  • Audible & visual alarms
  • Detects the smallest metal possible, while being immune to moisture, salt and fat content
  • Simple to service and maintain with replaceable boards
  • Easy to operate
  • Always know the status of your metal detector
  • Simplified troubleshooting by automatically diagnosing problem
  • Airborne interference can be eliminated
  • Able to withstand the harshest environments
  • Ensures long life of reliable service

Features

  • Highest Sensitivity of ANY pulsed eddy current metal detector available
  • Field Replaceable, Microprocessor based electronics
  • Potentiometers for adjusting sensitivity
  • Function, Metal and Fault Indication LED’s
  • Self test circuit
  • Adjustable Frequency
  • Three year warranty
Mar04

Ultra Seaech Metal Detector(USMD)

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USMD detects ferrous and magnetic metal contaminants accidentally present on industrial products, with levels of sensitivity, immunity to interference and response speeds designed to satisfy the strictest quality control requirements.

 

The use of high frequency detection coil technology and advanced head geometry combined with new enhanced filtering techniques to deliver unparalleled on-line sensitivity in a wide range of applications. All metal types are detectable, including the normally difficult to detect non-magnetic stainless steels and non-spherical contaminants such as wire and swarf.
USMD’s rectangular aperture metal detectors are designed to deliver unrivalled levels of detection sensitivity to all metal contaminants. When integrated with material handling and conveyor systems, these detectors provide fully automated product inspection.
Exceptional levels of sensitivity performance and stability make USMD Metal Detector as one of the most advanced in-line metal detectors available

Advantages

  • Detection of both magnetic and non-magnetic metals
  • High immunity to environmental interference
  • Installed without cutting conveyor belt
  • Very high reliability
  • USMD is a model for universal use, with a tunnel that can be opened if the conveyor belt can not be interrupted for installation purposes.
  • High level of electronic and mechanical reliability
  • Audible & visual alarms
  • Detects the smallest metal possible, while being immune to moisture, salt and fat content
  • Simple to service and maintain with replaceable boards.
  • Easy to operate
  • Always know the status of your metal detector
  • Simplified troubleshooting by automatically diagnosing problem
  • Airborne interference can be eliminated
  • Able to withstand the harshest environments
  • Ensures long life of reliable service

Features

  • Highest Sensitivity of ANY pulsed eddy current metal detector available
  • Field Replaceable, Microprocessor based electronics
  • Potentiometers for adjusting sensitivity
  • Function, Metal and Fault Indication LED’s
  • Self test circuit
  • Adjustable Frequency
  • Three year warranty
Mar04

Metal Detectors Detective Work

Posted by admin on 03/04/12  ~  Posted in: Metal Detectors India  ~  Send feedback »

Detective Work

In addition to recreational use, metal detectors serve a wide range of utilitarian functions. Mounted detectors usually use some variation of PI technology, while many of the basic handheld scanners are BFO-based.

Some nonrecreational applications for metal detectors are:

  • Airport security - screen people before allowing access to the boarding area and the plane (see How Airport Security Works)
  • Building security - screen people entering a particular building, such as a school, office or prison
  • Event security - screen people entering a sporting event, concert or other large gathering of people
  • Item recovery - help someone search for a lost item, such as a piece of jewelry
  • Archaeological exploration - find metallic items of historical significance
  • Geological research - detect the metallic composition of soil or rock formations

Manufacturers of metal detectors are constantly tuning the process to make their products more accurate, more sensitive and more versatile. On the next page, you will find links to the manufacturers, as well as clubs and more information on metal detecting as a hobby.

Mar04

Metal Detectors BFO Technology

Posted by admin on 03/04/12  ~  Posted in: Metal Detectors India  ~  Send feedback »

BFO Technology

The most basic way to detect metal uses a technology called beat-frequency oscillator (BFO). In a BFO system, there are two coils of wire. One large coil is in the search head, and a smaller coil is located inside the control box. Each coil is connected to an oscillator that generates thousands of pulses of current per second. The frequency of these pulses is slightly offset between the two coils.

As the pulses travel through each coil, the coil generates radio waves. A tiny receiver within the control box picks up the radio waves and creates an audible series of tones (beats) based on the difference between the frequencies.

If the coil in the search head passes over a metal object, the magnetic field caused by the current flowing through the coil creates a magnetic field around the object. The object's magnetic field interferes with the frequency of the radio waves generated by the search-head coil. As the frequency deviates from the frequency of the coil in the control box, the audible beats change in duration and tone.

The simplicity of BFO-based systems allows them to be manufactured and sold for a very low cost.  But these detectors do not provide the level of control and accuracy provided by VLF or PI systems.

Mar04

Metal Detectors PI Technology

Posted by admin on 03/04/12  ~  Posted in: Metal Detectors India  ~  Send feedback »

PI Technology

A less common form of metal detector is based on pulse induction (PI). Unlike VLF, PI systems may use a single coil as both transmitter and receiver, or they may have two or even three coils working together. This technology sends powerful, short bursts (pulses) of current through a coil of wire. Each pulse generates a brief magnetic field. When the pulse ends, the magnetic field reverses polarity and collapses very suddenly, resulting in a sharp electrical spike. This spike lasts a few microseconds (millionths of a second) and causes another current to run through the coil. This current is called the reflected pulse and is extremely short, lasting only about 30 microseconds. Another pulse is then sent and the process repeats. A typical PI-based metal detector sends about 100 pulses per second, but the number can vary greatly based on the manufacturer and model, ranging from a couple of dozen pulses per second to over a thousand.

If the metal detector is over a metal object, the pulse creates an opposite magnetic field in the object. When the pulse's magnetic field collapses, causing the reflected pulse, the magnetic field of the object makes it take longer for the reflected pulse to completely disappear. This process works something like echoes: If you yell in a room with only a few hard surfaces, you probably hear only a very brief echo, or you may not hear one at all; but if you yell in a room with a lot of hard surfaces, the echo lasts longer. In a PI metal detector, the magnetic fields from target objects add their "echo" to the reflected pulse, making it last a fraction longer than it would without them.

sampling circuit in the metal detector is set to monitor the length of the reflected pulse. By comparing it to the expected length, the circuit can determine if another magnetic field has caused the reflected pulse to take longer to decay. If the decay of the reflected pulse takes more than a few microseconds longer than normal, there is probably a metal object interfering with it.

The sampling circuit sends the tiny, weak signals that it monitors to a device call an integrator. The integrator reads the signals from the sampling circuit, amplifying and converting them to direct current (DC). The direct current's voltage is connected to an audio circuit, where it is changed into a tone that the metal detector uses to indicate that a target object has been found.

PI-based detectors are not very good at discrimination because the reflected pulse length of various metals are not easily separated. However, they are useful in many situations in which VLF-based metal detectors would have difficulty, such as in areas that have highly conductive material in the soil or general environment. A good example of such a situation is salt-water exploration. Also, PI-based systems can often detect metal much deeper in the ground than other systems.

Mar04

VLF Phase Shifting

How does a VLF metal detector distinguish between different metals? It relies on a phenomenon known asphase shifting. Phase shift is the difference in timing between the transmitter coil's frequency and the frequency of the target object. This discrepancy can result from a couple of things:

  • Inductance - An object that conducts electricity easily (is inductive) is slow to react to changes in the current. You can think of inductance as a deep river: Change the amount of water flowing into the river and it takes some time before you see a difference.
  • Resistance - An object that does not conduct electricity easily (is resistive) is quick to react to changes in the current. Using our water analogy, resistance would be a small, shallow stream: Change the amount of water flowing into the stream and you notice a drop in the water level very quickly.

Basically, this means that an object with high inductance is going to have a larger phase shift, because it takes longer to alter its magnetic field. An object with high resistance is going to have a smaller phase shift.

Phase shift provides VLF-based metal detectors with a capability called discrimination. Since most metals vary in both inductance and resistance, a VLF metal detector examines the amount of phase shift, using a pair of electronic circuits called phase demodulators, and compares it with the average for a particular type of metal. The detector then notifies you with an audible tone or visual indicator as to what range of metals the object is likely to be in.

Many metal detectors even allow you to filter out (discriminate) objects above a certain phase-shift level. Usually, you can set the level of phase shift that is filtered, generally by adjusting a knob that increases or decreases the threshold. Another discrimination feature of VLF detectors is called notching. Essentially, a notch is a discrimination filter for a particular segment of phase shift. The detector will not only alert you to objects above this segment, as normal discrimination would, but also to objects below it.

Advanced detectors even allow you to program multiple notches. For example, you could set the detector to disregard objects that have a phase shift comparable to a soda-can tab or a small nail. The disadvantage of discrimination and notching is that many valuable items might be filtered out because their phase shift is similar to that of "junk." But, if you know that you are looking for a specific type of object, these features can be extremely useful.

 

Sheiban Systems pvt Ltd.

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