Metal detector for gold searching: models, characteristics, operating principle

Not all metal detectors are suitable for gold prospecting. The standard model includes a transmitter with a sensor, a small generator and a control unit. Microcontrollers in devices operate at different frequencies. The main parameters of the detectors are the limiting detection distance, accuracy and resistance. Also do not forget about the working frequency.

Modern models are manufactured with high-quality transmitters that are capable of operating in different modes. To learn more about detectors, you need to understand how gold searches for a metal detector in streams.

Principle of operation

A standard metal detector for gold search works by generating a short-wave pulse from the transmitter. A microcontroller is used to receive the return signal.

The control unit processes the data and outputs the information. Devices differ in their indicators. The resistance level is measured by the sensor. In the end, the user receives information about the presence of metal in the ground.

Model Selection

Which metal detector to choose for gold prospecting? In the market, the user is able to find many compact detectors. As a rule, they are made with one transmitter. They have low sensitivity, and they are not able to work at high humidity. The undoubted advantage of professional detectors is low weight. Thus, the user is able to wear the device for a long time, and not to exert much physical effort. The devices are powered by lithium batteries of different capacities.

Some modifications are made with holders. The maximum search distance is about 50 mm. Many models are equipped with a protection system. Filters for modifications are applied with a resistance of 60 ohms.

If we consider a metal detector "Pirate", then it has a working humidity of 55%. The error coefficient is no more than 0.2%. Good models are sold with cases, and they are easy to transport. Also worth noting that it is worth choosing devices with quality handles on the strap.

Devices with a frequency of 20 kHz

Inexpensive metal detectors to search for gold at 20 kHz are able to work on soft soil. Their working distance is approximately 55 mm. Some modifications are made on two sensors. Sensors in devices are used with racks, and without them. Handles at detectors, as a rule, rubberized. Some devices are equipped with electronic control units that operate on batteries.

It is also worth noting that their resistance is low, but good conductivity. All this became possible, thanks to the use of adapters. If you choose a quality model, then you should pay attention to the modes. All this is necessary to save battery power and choose the optimal settings. Additionally, experts advise buying devices with integrated transmitters. They have high pulsation and there are no problems with failures.

25 kHz models

Modern detectors at 25 kHz are distinguished by good conductivity. These devices can work in different modes. Some models have two contact transmitters. The minimum working distance is 20 mm. Models of this type are well suited to search for gold in soils of medium humidity. If we consider a metal detector "Pirate", then it has an operating temperature of 45 degrees. Sensors for modifications are used at 20 mV.

The batteries are of lithium type. Many detectors are capable of boasting electronic indicator systems with voice notification. It is also worth noting that the market presents many compact models at reasonable prices.

Among the shortcomings can be identified cumbersome sensors. On average, their diameter is 8 cm. Very few models are made with filters. And the error rate is high.

Metal detectors at 30 kHz

Detectors at 30 kHz can be produced with several transmitters. Filters are most often used for 4 mV. They have good conductivity, but there may be problems on solid grounds. The level of ripple in this case depends on the control unit. If we consider qualitative modifications, then they have an electronic control unit. It works with voice notification.

The limit resistance of detectors starts at 45 ohms. Many devices have fuses, and the batteries are of lithium type. Very often there are searchers with a vibration signal. If necessary, you can connect headphones. Professional detectors are manufactured with wide handles and clamping straps. Devices differ in security. If we consider models with a single transmitter, then the error of their error is rather low.

Devices of low sensitivity

Beginners often choose low-sensitivity devices. They are cheap, they can work in an economical mode. Some modifications are suitable for soils of different densities. Lonely it is worth noting that the devices are not distinguished by a good search accuracy.

The operating frequency of the detectors averages 10 kHz. Many models are made with one transmitter. As a rule, it is installed in an integrated type. Detectors are equipped with a standard display system. Also worth noting that there are decent models, but they have large dimensions.

Detectors of high sensitivity

Devices of high sensitivity are suitable for searching for gold in places of high humidity. Experts often choose them for good conductivity. Experts say that it is necessary to give preference only to models with integrated sensors.

The optimal working distance is 55 mm. At the same time, the resistance coefficient should not exceed 45 ohms. The rack and the holder itself are evaluated last. Permissible humidity for detectors of this type is 75%. Batteries are of high capacity, since devices consume a lot of energy.

Models of the trade mark Minelab

Which metal detector to look for gold? Answering this question, it is important to mention that Minelab is the leader in the production of detectors. In the assortment of the company there are models for novice gold prospectors, as well as for professionals. Devices differ primarily in the operating frequency. The most qualitative are considered to be modifications to two contact transmitters. They use thin filters and sensitive sensors.

Models are able to operate at different humidity, and the user himself chooses the mode. In addition, it should be noted that the market has compact detectors. They have short handles with holders. Models differ in security. Modern devices are made with fuses and electronic control units. The error coefficient is very small.

Characteristics of model Minelab X-Terra 305

This metal detector for searching gold and coins has the following characteristics: optimal working distance 55 mm, frequency 20 kHz. The device can boast of good sensitivity, but it has only one transmitter. The sensor is used without an amplifier. If you believe the buyers, then the detector quickly turns on. He has a good block, and he rarely breaks.

The error ratio is 0.02%. The device may be used in a humid environment. He has a well-protected filter. Also worth noting that the model is not afraid of high temperature. The handle at the detector is rubberized and is very rigid. The fuse in this case is absent, but there is a metal detector for gold search 25620 rub.

Detector series Minelab X-Terra 505

This metal detector for gold searching is suitable for beginners. The model uses an integral transmitter of contact type. The manufacturer provides a calibration function, and the model quickly turns on. If you believe the customers, then the searcher is allowed to use at high humidity, and even when the maximum temperature reaches 45 degrees.

The frequency of the detector is at least 5 kHz, so the battery is quickly charged. The error coefficient of the modification is small. If we talk about shortcomings, it is worth noting a lot of weight. There is only one jack for headphones. The model does not have a vibrating alert option. The coefficient of resistance of the detector is 3 ohms. It is worth a metal detector to find gold about 34900 rubles.