Change disc metal detector

Change disc metal detector In the category metal detector coil more articles and learn more information about Change disc metal detector Reviews Price Specifications Features Image manuals videos Accessories All this in metal detectors for gold.

Bobinas SEF Coil

  Bobinas SEF Coil Bobinas SEF Coil Detection coils throttle to increase the depth designed for Read more

Coil detector 18 x 17 ” – 45 cm for detectors Minelab GPX 5000, 4800, 4500

Coil detector 18 x 17 '' - 45 cm for detectors Minelab GPX 5000, 4800, 4500

Change disc metal detector

Change disc metal detector


Change of head before changing the sensor


To replace a sensor head to your original disk can have a significant impact on the performance of your detector and this according to the type of terrain. Thus, by increasing the diameter of detection, you earn generally swept surface and depth despite increased weight, increased the false signals and a loss of precision in the process of locating the target. You will understand that before you buy a sensor, it is important to know the number of disks in detection (type and diameter) available for each model. Often within the same brand, the heads are compa-fuel on the equivalent frequency detectors.


Accuracy or performance?


There are three major types of technology:


The concentric heads: they allow better discrimination, selectivity, and location of the target. The electromagnetic field, in inverted conical shape, allows to concentrate the signal on the target, making it generally more accurate. Unfortunately, such signals are susceptible to disruptions in ground effect. The SPIDER is a recent development of the concentric head. Some detectors per – put a depth gain more important, despite a slight loss of accuracy and less net sound at the base of the target.


DD or WIDESCAN drives: they can detect in depth by emitting an electromagnetic field whose maximum efficiency of detection occurs in a cylindrical volume. They are less sensitive to ground effect and offer generally, on any type of field, better performance than disks SPIDER or CONCENTRIC, despite a more difficult target location. This technology allows to develop drives can reach 45 cm in diameter! Little by little, manufacturers include the interest of these discs and integrate on their high-end series models. More your disk has a large diameter, more your detection depth is increased. Unfortunately, some small objects in alloy or gold may be less well detected with a large disk. Large diameter discs are also heavier and less precise in area contaminated by ferrous. This is why very small diameter discs have been created to move certain lands to the comb. The form of the disc may also affect performance. Elliptical heads Excel in research on very polluted or saturated land in ferrous, both their selecti-vite is great. This precision gain unfortunately causes a loss of depth. Today, the best compromise and the best performances are obtained with DD 25 × 35 cm of elliptical discs. These drives are available as an option in the DETECH brand.
SEF: The market revolution: in mid-2008, the DETECH brand, known for its great DD disks, has patented a new technology called SEF. These drives “butterflies” are based on a double ellipse; elliptical discs are already known for their precision on small target. These disks to a new genus resumed the strength drives spider or concentric, namely precision, selectivity, discrimination and the strengths of DD disks that are better increased penetration of soils mineralized and a surface scan. All SEF drives provide a minimal weight given their size. They are available in many sizes and for many models of sensors. Whether on the beach or in the inner land, these versatile discs will greatly increase the performance of your machine. Icing on the cake, despite a larger size, the “pinpoint” remains very easy. Performance on all types of targets are compounded especially without loss with regard to all small objects (rings, medals, tiny currencies) Gold or alloy and, unlike the DD of large diameter discs. This form of specific disk had been talking about the NEXUS, very expensive detector manufactured in the same country as the SEF discs.
When you use a large traditional DD (38-45 cm) disc, you win in depth and detection surface. nothing more natural, as the coil is of substantial size. Unfortunately, this gain on big module (part of 20 to 40 mm) is accompanied by a loss on small targets, especially if they are alloy. With these disks, it is also common to large holes because due to their large diameter, it seems inevitable to dig near the target. The big difference is that form butterfly, the SEF drive, regardless of its size, does no loss on small target. You will see even a slight gain on any small targets (gold, small ridges… ring) difficult to detect habit, all with increased stability and localization of the easy target. This is the real breakthrough brought by this technology that saves you in accuracy and performance. In a little over 2 years these discs have sold more than 2500 copies in France and are now all good brands of detector in improving their performance. They are available exclusively at the Boutique of the excavator who introduced them in France.
ULTIMATE: The latest evolution of the SEF disks: in 2012, the DETECH mark has been evolve recordings SEF 30 cm making them even more stable, lighter and almost insensitive to interference from shock or dew. Thus ULTIMATE 33 cm (single diameter) discs took the place of the SEF 30 cm discs. SEF technology continues to equip it drives of 20, 38, 45 and 53 cm.

The sizes of disks

After having addressed the technological aspect, are talking about the sizes of drives available.
Standard discs: 19-22 cm. This is the standard size disc which equips the entry-level detectors.
Large disks: 27-54 cm. These discs allow gain detection surface and in depth. 22 To 27 cm gain is obvious especially if you switch from a concentric 22 cm to 27 cm DD or 30 cm SEF. The performance of 27-30 cm discs are pretty much the same as the 38 cm discs. These are heavier and less handy but allow to cover more surface. They are therefore more suited to flat surfaces as in prairie, at the beach or in fields. 27-30 Cm discs cover less surface but are lighter and more manageable and therefore more suitable for uneven terrain or forest.
The small disks: 10-15 cm. Apart from these discs ‘SEF’, more you mount diameter over the sensor gains in depth and detection surface but loses precision. This is even more visible on very polluted land into small ferrous or a phenomenon of masking can be felt, especially if the sensor is slow to react between two targets nature.
This is that small drives are their own. We talk about small disk for heads whose diameter is less than or equal to 15 cm. TESORO and TEKNETICS brands have understood the expectations of demanding prospectors and offer this kind of discs for all their detectors, while other brands, believe it or not, have not even made of less than 20 cm! It is technology DD or concentric, a small disk will allow a huge gain in precision. On land saturated with ferrous, whether of a collapsed roof with missing (presence of numerous roofing nails), a ruin, an old wall, baseboards, a cellar or a river bed, this kind of drive will allow slaloming between iron debris polluting these lands in li – miter the problems associated with the masking of ferrous (‘IRON MASK’ in French) phenomenon. The location of the target (pinpoint) naturally becomes child’s play. These heads can sneak into the Brambles and spend in places inaccessible with other drives as for example at the bottom of a hole. The disadvantage is loss of some power because of the small diameter. Small drives are therefore very useful on many sites; experienced developers know that, that is why they still have in their bag or trunk of car an as disk.