Vlf Metal Detector Theory

This video is about metal detector discrimination first principles.

Vlf metal detector theory. Very low frequency vlf detectors are the most versatile metal detector types based on the range of metallic objects you can find with them. Multi frequency transmitting and receiving metal detectors have a signifi cant advantage in time constant discrimination and to some extent ferrous discrimination capability over the most common form of detector the vlf detector. In a vlf metal detector there are two distinct coils. Inside the metal detector s loop sometimes called a search head coil antenna etc is a coil of wire called the transmit coil.

Electronic current is driven through the coil to create an electromagnetic field. Transmitter coil this is the outer coil loop. Works as described above with two coils one transmitting and one receiving. They are ib induction balance detectors using very low frequencies.

The coil or search head of these detectors consists of two separate coils of wire. Vlf stands for very low frequency. Beat frequency oscillator technology vlf. Convert your smartphone into a multi frequency vlf metal detector.

Vlf technology is a good detector that meets most detector needs. This metal detector has 2 coils placed close together. Vlf detectors usually operate at a frequency in the range of 3khz 30khz. This is the simplest for of metal detector technology and is used most often in entry and mid level machines.

The most popular and most widely used detectors are vlf detectors. The first coil sends an alternating low frequency current produced by an oscillator into the ground. Stands for visual discrimination indicator which characterizes metallic objects according to their size shape and composition. Electricity is sent along this wire first in one direction and then in the other thousands of times each second.

Vlf is today the most common metal detector and the one that works best as an all round detector. Vlf very low frequency transmitter receiver transmitter. The outer coil produces a vlf below 30khz impulse which is directed into the ground.