Comparison Minelab X-Terra Pro vs Minelab Vanquish 540 Pro-Pack

- Ground. Metal detectors designed to find metal objects buried in the ground - from coins and other historical artifacts to pipelines and caches. They can have different characteristics and scope of application - from the simplest models, suitable only for collecting scrap metal, to powerful professional devices capable of searching even at a depth of a couple of meters. The coil can be protected from moisture (see below), but ground metal detectors are not designed for complete immersion in water.

- Underwater. Metal detectors, designed, as the name suggests, to search for objects under water - primarily at the bottom of reservoirs. Their main features are due to optimization for the environment: a sealed waterproof case (in most cases, with the ability to submerge the entire body to a depth of several meters), the ability to work with wet salty soils, and a weight distribution designed for ease of use under water. Also, such models are usually equipped with waterproof headphones. Note that buying such a device for land use is hardly justified: holding an underwater metal detector in the air is not as convenient as a regular ground detector, and the expensive moisture protection of the case loses all its meaning.

- Inspector. Devices designed to conduct searches and search for metal objects on the human body, under clothing. They are used by law enfo...rcement agencies, security services at airports, train stations, security agencies, etc. Note that in this case we are not talking about stationary “frames”, but only about hand-held detectors. Almost all of them belong to pinpointers (see “Type”) and have a fairly compact size. Thanks to this, the device can be used as a portable device for express inspections, constantly carried with you along with other equipment. However, such a detector can also be useful at a stationary checkpoint, in addition to the frame - it helps to determine exactly where on the body the object that “disturbed” the frame is located.

— For mine clearance. Highly specialized metal detectors for detecting mines or other explosive objects left by the echo of wars and hostilities. Such devices do not need to separate finds by type of metal. Their main purpose is to search for large projectiles, but there are other types of devices for solving specific problems (for example, detecting plastid with a fuse). Small pieces of hardware are usually ignored by such metal detectors. Mine clearance detectors are rarely found in common use, and they are incredibly expensive. Devices for this purpose are heavy and inconvenient, but durable and resistant to weather conditions. They are aimed at professional use by the military and rescue workers.

The size of the standard coil (frame) of the metal detector. Theoretically, the larger it is, the deeper the device is able to “see” and the more space it captures in one pass, but the worse it is suitable for searching for small objects and the lower the accuracy with which it localizes them. At the same time, these characteristics depend on so many other factors that in fact, the size of the coil itself affects them very little.

Note that for coils (frames) of an elliptical shape, only one size can be indicated — along the length.

The number of coils provided in the scope of delivery of the metal detector.

Emitter-coils are used in metal detectors with all operating principles (see above), except for RF (frames are more justified for them). Also note that, unlike the frames, such emitters are installed only one at a time, and even a paired DD type emitter (see "Coil type") is considered one coil. So if there are several coils in the kit, this means that they are interchangeable. Such a complete set is convenient in that it allows you to choose a working nozzle depending on the specifics of the situation. For example, for the initial search, you can use a large coil, with low accuracy and wide coverage; and having found something interesting, you can put a "sniper" attachment and determine the exact location of the find. However, the features of such a configuration may be different, interchangeable coils may have a specialization in metals, soil types, etc., and it's ok to clarify their features separately before buying.

Also note that some models may not be equipped with coils at all. On the one hand, this means additional efforts to select and purchase these parts, on the other hand, it allows you to choose them yourself according to your own requirements, without relying on the manufacturer's decisions. This option is useful for advanced "treasure hunters".

The number of individual operating frequencies at which the metal detector can operate. For more on the frequencies themselves, see "Detection Frequency" below; here we note that the more options ( 3 frequencies and more) are provided in the design, the wider the capabilities of the metal detector, the easier it is to adjust it to the specifics of the objects being searched and the environment. However, most models have one frequency.

The operating frequency (or frequency range) of the metal detector. This is one of the most important parameters when choosing a device, because the optimal frequency for different cases will be different — depending on the size and material of the items being searched, the characteristics of the soil and other factors. Detailed recommendations on the choice of frequency for each specific situation can be found in special sources; And already on the basis of this information, it is worth choosing a specific model.

Note that the actual frequency at which the metal detector will operate also depends on the installed coil — they are usually made for a specific frequency. Therefore, to use the full capabilities of the device with the ability to adjust this parameter, you may need replaceable coils.

The number of individual discrimination programs provided in the design of the metal detector. In this case, discrimination means filtering the detected objects using a discriminator (see above) so that the device does not work on unwanted objects such as pieces of foil, bottle caps, etc. You can also configure such a filter completely manually, but this may require special knowledge and create difficulties for inexperienced users. To avoid this, some models may have preset programs instead of manual settings. Thanks to such programs, the user just needs to select from the list what type of objects the metal detector should react to, and all the necessary settings will be set by the device's electronics.

Ground balancing method provided in the design of the metal detector. By itself, such balancing is a setting of work parameters for the characteristics of a particular soil — after all, depending on its mineralization, humidity, etc. The soil affects the search signal in different ways, and the device electronics must take this effect into account for high-quality processing of such a signal. Due to the correct balancing, the detection of the desired objects is ensured and at the same time the probability of false positives is minimized; and it can be done in the following ways:

— Automatic. The most convenient type of balancing that does not require the user to manually adjust the device. Usually, tuning requires some time to move the coil up and down above the ground until the automation sets the necessary parameters. There are two types of auto tuning: preset and tracking. The first option involves balancing the metal detector for a specific type of soil before starting work, after which the device uses the same parameters until the next setting. Such a scheme is inexpensive and can be used even in fairly simple models, but it is not very reliable: even a small change in the type of soil under the coil leads to a decrease in the effective detection depth and an increase in the probability of false positives. Follow-up balancing does not have this disadvantage: devices with this function constantly monitor the characteristics of t...he soil and make the necessary corrections to the operating parameters right in the process of operation. This increases the efficiency of the search, however, the price of such devices is very high.

— Manual. As the name implies, with such balancing, the necessary parameters must be set by the user himself. This option is considered the most reliable, because. even the most advanced automatic systems do not always work perfectly; And yes, this setup is cheap. On the other hand, it requires certain skills from the operator and may not be suitable for inexperienced users.

— Manual / automatic. A variant that combines both types of balancing described above; in such models, the user can choose the way of setting as they wish.

The number of pre-installed programs for searching for various materials. Their number reflects the capabilities of a particular model, allowing you to start working right off the bat.

Regular metal detector search programs include detection of coins, all metals, jewelry and relics. In some models, this list can be expanded with "Beach" programs, custom (user) detection mode, etc.