Metal Detector-Membrane Switch

Label:electronic instrument, underground metal detector, instrument display, panel design

Oct 16, 202013300

Metal Detector-Membrane Switch

A metal detector is an electronic instrument that detects the presence of metal nearby. Metal detectors are useful for finding metal inclusions hidden within objects, or metal objects buried underground. They often consist of a handheld unit with a sensor probe which can be swept over the ground or other objects.


Different metal detectors work in various different ways, but here's the science behind one of the simpler kinds. A metal detector contains a coil of wire (wrapped around the circular head at the end of the handle) known as the transmitter coil. When electricity flows through the coil, a magnetic field is created all around it. As you sweep the detector over the ground, you make the magnetic field move around too. If you move the detector over a metal object, the moving magnetic field affects the atoms inside the metal. 


The underground metal detector applies advanced technology, has the characteristics of wide detection, accurate positioning, strong resolution, and easy operation. It is mainly used to detect and identify buried underground metal objects. In addition to military applications, it is also widely used in security inspection, archaeology, prospecting, and looking for scrap metal.

The underground metal detector adopts sound alarm and instrument display, and the detection depth has a great relationship with the area, shape, and weight of the detected metal. Generally speaking, the larger the area, the larger the corresponding detection depth. Conversely, the smaller the area, the smaller the corresponding detection depth.


Generally, there are many buttons on the panel of a metal detector. Buttons include tuning buttons, sensitivity buttons, identification buttons, etc. Of course, the mode button and power button are also indispensable.

Due to the wide variety of metals underground, some instruments have the function of distinguishing specific metal types. Therefore, the designer will put the words "GOLD", "SILVER" and "BRONZE" on the panel to facilitate users to distinguish metal types.


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