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Universal Cable Coil (8m) 26 Feet Circumference

This extremely lightweight and easy to transport universal cable coil offers a varies of different search coils for different search applications. The cable coil has to be fixed with tape on a frame which can be made of inexpensive PVC-tubes for example. The following search coil configurations are mainly useful for the location of metal objects with a surface of at least 6 cm2 or fist sized metal objects for example. Small metal pieces like single coins or nails will be indicated with very poor sensitivity or will even be eliminated in some cases because they are out of the range of those frame coils. IT is very easy to cover a large area with frame coils in a short time. This is especially useful when looking for bigger deeply buried metal objects while ignoring those smaller metal pieces at the surface of the ground.

The following frame mounted search coils must be carried by two people with adjustable carrying-straps. The search coil must be held in parallel to the ground at a distance of 10-60cm. The electronics control box should always be carried far away from the field of the search coil. It is also necessary not to wear any clothes with metal when operating the Lorenz Deepmax to avoid false signals.

Universal Cable Coil (8m) mounted as a 2m x 2m Universal Cable Coil (1 winding)

The universal cable coil has to be laid to a single turn on a non-metallic frame and has to be fixed with tape for example.
This particular search coil covers four times as much ground as a 1m x 1m frame coil does. It should only be used when searching for metal objects with a surface of at least 20cm x 20cm pointing towards the coils. Smaller targets will be located less effectively than with a 1m x 1m frame for example. This is mainly because it will become more difficult to pinpoint those smaller objects with the large coil. The maximum detection depth is limited at 8m. This can be achieved when locating large objects like lost aircraft or drums for example. The 2m x 2m frame coil can be carried by two people without carrying straps. This is particularly useful when trying to ignore medium sized metal objects which are smaller than a horses shoe. Coins and nails will no longer be detected when doing this.

The 2m x 2m coil acts as a large antenna for medium wave transmitters. Therefore smaller frames like the 1m x 1m coil for example will be less sensitive in general but won't suffer from electromagnetic interference of transmitters, power lines or the ground itself.

Universal Cable Coil (8m) mounted as a 1m x 1m Universal Cable Coil (2 windings)

The universal cable coil has to arranged to a 2 winding search coil and has to be fixed on a 1m x 1m PVC-tube frame for example.
Searching with the 1m x 1m frame coil is mainly advisable when looking for fist sized or bigger metal objects buried deep while ignoring small coins, nails and pieces of foil at the surface of the ground. The possible detection depths with this particular frame coil are very high compared with standard sinewave VLF-TR-detectors. This is one of the reasons why this particular search coil is used for most professional applications.

The detection depths are in some cases even higher than these achievable with much more expensive magnetometers which can detect ferrous metal objects only. The lorenz deepmax is specially sensitive to gold and many other non-ferrous metal objects no matter which coil is connected.

The maximum detection depth is limited at 6m with this particular search coil. Large areas can be covered in a short time. Best results are achieved with metal objects having a surface of at least 10cm x 10cm. Because of the size of the coil, most of the small metal fragments will be ignored. However bigger nails can be identified with the target-ID. Most of the nails and other metal fragments can be easily eliminated by increasing the distance between the search coil and the ground. Even at distances of 50cm there will only be negligible detection depth losses when locating large metal objects. This frame coil has to be carried by two people with the supplied carrying straps. The high depth range of the 1m x 1m frame coil is achieved with it's intense and therefore deep going magnetic field transmitted.

Universal Cable Coil (8m) mounted as a 0.7m x 0.7m Universal Cable Coil (3 windings)

The universal cable coil has to be arranged to a 3 winding search coil and has to be fixed on a 0.7m x 0.7m frame made of PVC-tubes for example. Never use any metal screws for the construction of a frame! This is the smallest frame mounted search coil which offers extreme detection depths for smaller and medium sized objects.
Metal fragments and some coins will still be indicated. The maximum detection depth is limited at 4.50cm. This 0.7m x 0.7m coil receives less interference from power lines or transmitters than larger 1m x 1m or 2m x 2m coils do.

Universal Cable Coil (8m) mounted as a 1m x 2m Universal Cable Coil (compensated)

In order to construct this compensated coil the coil cable has to be laid to the figure of the shapes of an eight (8) first. The coil cable has to be fixed on a 1m x 2m frame with a center part which divides the frame into two 1m x 1m frames. The cable has to be laid and fixed twice on the center part as this is the middle of the figure eight (8). This type of frame mounted search coil is about 30% less sensitive than a 1m x 1m search coil. This is because of the opposite directions of transmitted magnetic pulses. During the receiving phase the two coils of the eight do also work in opposite. Therefore magnetic interference and some ground indications are subtracted from each other and therefore eliminated.

Interference from radio transmitters or power lines will be almost completely cancelled. Highly mineralized ground will be indicated less sensitive than with a 1m x 1m search coil. This compensated 1m x 2m frame mounted search coil is of great advantage when locating metal objects in urban areas where interferences are often expected. This type of coil has a very poor sensitivity for very small metal objects. The minimum surface of a metal plate should be 10cm x 10cm to ensure best results when working with this coil.

Although being less sensitive, the compensated 1m x 2m coil offers very good detection depths on most types of ground. The Lorenz Deepmax will work very stable with this particular coil. The maximum detect depth is limited at 4m.
The following described 1m x 1m double frame coil will give much higher detection depths namely almost the same sensitivity range as a single 1m x 1m frame but is also capable to cancel out said interferences.

Special Cable Coil 12 meters perimeter
1.5m x 1.5m (2 windings) or 3m x 3m (1 winding)

Similar to the universal cable coil this large coil cable can be arranged on two difference frame coils by simply fastening one or two windings on a non-metallic frame with tape or cord. With the largest 3m x 3m frame coil detection depths ranging up to 12 meters can be achieved. This is mainly possible because of specially developed electronics to eliminate low frequency interference and a power plus circuit of the Lorenz Deepmax. The high sensitivity for large and deeply buried metal objects and the simple elimination of smaller metal fragments make these two coils interesting. The shape of these large coils should be the same as with the other coils namely round or square. It is also possible to build elliptical or other shapes, but this is only achieved at the expense of sensitivity.

In urban areas the amounts of interference produced from power lines will be higher than with small coils and therefore again the sensitivity might be reduced. The two ground balance systems g1/g2 should be turned off while using these large coils because of the same reason. Anyway it is advisable to keep a distance of at least 40-80cm constantly between the coil and the ground to reduce the amount of ground effects to a minimum when using these very large coils.