Metal Detector
Get Price Quote
Metal Detector detects the presence of metal by giving audible warning. This project indicates the presence of ferrous as well as non-ferrous materials depends on the absorption of magnetic energy. An inductor, which forms part of a tuned oscillator circuit, radiates a magnetic field. When a metal object is introduced into this field, enough magnetic energy is absorbed to cause the oscillator to stop working, which causes the output of IC1 high. Transistor T2 turns on and buzzer raises the alarm. IC1 is a Schmitt Trigger IC, which gives output according to the upper and lower threshold voltages set at input pin2 and pin3 respectively.About the Circuit :In the circuit diagram, L1 and C1 form an oscillator circuit operates at a frequency of about 70KHz. L1 also serves as a sensor. Because of the high value of resistor R1, the oscillator only just operates. This is desirable; otherwise any losses in the tuned circuit would easily be replenished by the transistor T1.When the metal object enters in the field induced by L1, the oscillator output is detuned. This output is rectified by diodes D1 and D2 and given to pin2 which is the upper threshold voltage of IC1.This voltage is below the lower threshold voltage at pin3, which is set by R7, R6 and P1. Hence the output at pin6 goes high and T2 turns on. Piezobuzzer connected at the collector of T2 sounds an alarm.Note : Inductor L1 is not intended to be fitted on the circuit board.Calibration : If the oscillator does not readily start at any setting of P1, the value of R1 must be reduced. If on the other hand, the oscillator does not stop working when a metal object is held near L1, the value of R1 must be increased. Starting with the wiper of P1 to earth, adjust the preset so that the buzzer just does not operate. If a lower sensitivity is required advance the wiper slightly further. Current consumption is determined primarily by whether the buzzer is energized or not, in any case it is not greater than 50mA.
Metal Detector
Get Price Quote
Best Deals from Bomb Disposal Equipment
METAL DETECTOR ROUND MACHINE
Get Price Quote
BODY / CONSTRUCTION Simple to use, convenient , easy to carry . Made from high quality ABS Plastic . Battery case : self locking aswell as screwable Nylon handle strap to hold Total Weight of detector : 275 grams (including rechargeable battery ) (without charger ) Total length : 420 mm Thickness of handle : 30 mm OPERATIONS Single detection program to detect all ferrous metal and non-ferrous metals . Detection sensitivity easily adjustable . Duration of operations under single full charge : above 50 hours. Low battery LED indication with auto cut off , to prevent battery from deep discharge. Detection mode : 2 detector has user selectable options (a) Visual + sound (b) Visual + vibration Easy to operate, single switch for selection of operations in any of the 3 modes :- 1. Off position 2. Vibration + Visual (LED) metal indication mode 3. Sound + Visual (LED) metal indication mode BATTERY & CHARGER Inbuilt Ni-mH 9V 300 mAh Rechargeable Battery Life of battery : approx 1 year . Battery easily replaceable without any tools. External battery charger 90-260 V AC , 46 - 63 Hz . Easy connection of charger with HHMD. Auto cut off to prevent battery over charging. Suitable for temperatures from -20 deg C to 55 deg C . For indoor use only.
Hand Held Metal Detector
1,000 - 1,200 Per
Hand Held Metal Detector
Get Price Quote
We are offering highly effectual Hand Held Metal Detector in the market. The Hand Held Metal Detectors are used by policemen and security personnel before someone is entering into an important place like malls, airports and other eminent places. Widely appreciated by our customers due to their fast sensing and handy nature, they are high on demand for security checking at the strategic place.
security metal detector
Get Price Quote
Telecommunication Equipment, walkie talkie
Metal Detectors
Get Price Quote
Metal Detectors, access controls system, bio metric proximity card machine
explosive detector
Get Price Quote
explosive detector, Shock Sensor, DVR-PTZ Keyboard Controller, Splitter
explosives detectors
Get Price Quote
explosives detectors, Wax Coated Safety Fuses, gun powder
Metal Detector
Get Price Quote
bar code reader, Finger Print Reader
Metal Detectors
Get Price Quote
Metal Detectors, Access Control System, automated gates, Fire Alarms
Metal Detector
Get Price Quote
closed circuit tv camera, fire extinguisher repairing services
Food Metal Detector
Get Price Quote
carton batch coding machine, Automatic coding machine, Number Marking Machine
Metal Detector
Get Price Quote
bar code reader, dvr dome camera, Ir Camera