Month: August 2014

What Are the Essential Features of Metal Detector?

A metal detector is a device that uses electromagnetism power to locate and discover different types of metals which are thought to be lost or hidden somewhere. These include: relics, special coins, jewelry, and pieces of expensive and valuable metals.

Which Features should a Metal Detector Have?

Metal detecting activity is done in places such as mines, deep sea, forests, and underground. Therefore, for a metal detector to be effective, it should have certain features that are designed to detect atoms of metals. These include:

1. Discrimination

What Are the Essential Features of Metal Detector

Some people prefer to go for metal detecting in water bodies. Here, there are numerous types of minerals and metals too. Thus, conducting metal detecting in such places is likely to be affected by the presence of these numerous elements. The process is interrupted by frequent and unnecessary signaling.

To control this, a metal detector is enhanced with discrimination ability. This ability enhances it to differentiate between different metal elements. Some metal detectors are designed to be sensitive to certain specific metals. Thus, they only emit signals when passed across places with such metals.

2. Sensitivity

Nowadays, metal detectors have been designed to be highly sensitive. A high quality metal detector has a high operating frequency. This enhances it to detect metals which are buried under the soil. It also enhances it to detect metals which have corroded after being under weather for long.

Operating frequency ranges from 6.4 kHz to 20kHz. The sensitivity control can be adjusted according to the condition of the place where one wants to conduct metal detecting. Highly sensitive metal detectors make the process fruitful and easier.

3. Metal Detector Technology

What Are the Essential Features of Metal DetectorMetal detectors are fitted with different technologies that increase their potential to work under different conditions. These include: VFL and PI. VFL stands for very low frequency. It allows a metal detector user to regulate the magnetic field emitted to metals during search. Thus, one can be able to search for specific metals and in different conditions. PI stands for pulse induction.

It is a technology designed on the coil. It allows the coil to send electric current to the metal atoms. This creates electromagnetism relationship between metal atoms and the metal detector device. Through sending and receiving different pulses, PI determines the depth at which a metal detector can go to find a metal.

4. Calibration/Ground Balance

Ground balance controls the attraction which instructs the metal detector to sense a metal. It prevents emission of signals when a metal detector is passed over natural objects such as soil particles, stones, or valueless minerals. Thus, a metal detector can only be attracted to a valuable material or metal.

5. Coil Size and Shape

Coil’s size and shape has a significant impact on the depth that the electromagnetic waves emitted can reach. There are 3 types of coils namely: concentric, spider, and elliptical. These coils differ in depth, thickness, and penetration ability. The soil type also affects the penetration of a coil. This can have a direct effect on the quality of work done by the device and its effectiveness in locating the position of metals.


Metal detectors can locate metal objects on the ground surface and also in water. It uses electric current to create the electromagnetic waves which are used to detect a metal and emit signal. Therefore, basic features such as: batteries, loudspeakers, handles, and base are also essential parts of a metal detector. Be sure to check all these features before settling to buy a certain metal detector.