Handheld metal detector
The handheld metal detector is a kind of metal detector, which is named because of the way it is used. The following is a detailed introduction to the handheld metal detector:
一、Working principle
The hand metal detector works on the principle of electromagnetic induction. When a magnetic field is detected, items close to a conductor are sensed by the detector, which generates a voltage signal and activates the detector alarm system.
二、Application
Security check: Hand metal detectors are widely used to prevent theft in factories, security checks in places and to prevent cheating in exam rooms. It can detect weapons, explosives or small pieces of metal in packages, luggage, letters, fabrics, etc., carried by people. In factories, hand metal detectors can be used to check whether employees are carrying metal items to prevent the loss of business products. In test rooms, handheld metal detectors can be used to check whether candidates are carrying cheating tools such as wireless headphones.
Special fields: Because of its high sensitivity and accuracy, hand metal detectors are also used in special fields such as prisons, chip factories, archaeological research, and hospitals.
三、Feature
Easy operation: The special appearance of the sensitive surface of the hand-held metal detector makes the operation easy and easy. It is usually equipped with an alarm system that will sound an alarm when a metal object is detected.
High sensitivity: Handheld metal detectors have extremely high sensitivity and accuracy, and can accurately detect extremely small metal items (such as 0.1g or even smaller).
Multi-alarm mode: Handheld metal detectors usually have a variety of alarm modes, such as sound alarm, vibration alarm, etc., to adapt to different use environments and needs.
Long battery life: Handheld metal detectors are usually powered by nickel-hydrogen batteries or alkaline batteries, which have long battery life and can be used continuously for several hours or more.
四、Attention
When using a hand-held metal detector, the equipment should be used correctly according to the instructions, and self-check before testing to ensure the normal operation of the equipment.
Avoid putting the detector close to large metal objects and places with interference sources (such as high-voltage power lines, etc.), so as not to affect the normal operation of the detector.
Hand-held metal detectors need to be waterproof, moisture-proof and dust-proof to maintain their performance and extend their service life.
In summary, the handheld metal detector is a kind of portable equipment widely used in security inspection, special field detection and other fields, with simple operation, high sensitivity, multi-alarm mode and so on. In use, it is necessary to pay attention to relevant matters to ensure its normal work and extend its service life.
