The intended use of the PMG-2 proton magnetometer and gradiometer is for a field survey of mineral deposits, searching for buried ferrous, and other magnetic objects. The proton magnetometer PMG-2 can also be used for long-term stationary Earth magnetic field measurements and or for a field survey of daily variations of the Earth magnetic field. It can also be useful in archeology in searching for buried foundations/walls.
The proton magnetometer and gradiometer PMG-2 is robust, reliable, water and dust resistant, and easy to use. The PMG-2 measures Earth’s magnetic field in a range of 20 000 – 100 000nT. It is equipped with a FLASH memory with capacity up to 24 500 measurements. The saved data are transferred to a computer via the USB interface.
The PMG-2 also allows, when measuring on a marked grid, automatic position increment for each measurement on a marked grid line. This simplifies this type of measurement, and it is not necessary to set the position on the grid before each measurement. However, it is required to change the line by the operator when switching to a new line.
To measure daily magnetic field variations, the PMG-2 proton magnetometer is equipped with an anchor ring with ropes and tent pins for anchoring the sensor. The AUTO measurement mode is intended for measuring the Earth’s magnetic field daily variations, where the time of the first measurement can be set, and also the interval between individual measurements in the range of 5 s – 24 h with a resolution of one second.
If the PMG-2 proton magnetometer is used in a fixed location, it can also be powered from an external source using the charging connector. Another 12 V lead-acid battery or a charger can be used as an external source. However, the standard charger is not suitable as a fixed power supply for stationary use. If you are going to use PMG-2 in a fixed location, let us know, and we will supply you with a suitable power supply.
The PMG-2 proton magnetometer and gradiometer allow measurements with either one or two sensors. When measuring with one sensor in SINGLE mode, the absolute value of the induction vector of the Earth’s magnetic field is measured. With this type of measurement, it is necessary to use another instrument and measure daily variations of the Earth’s magnetic field. The data are needed to correct the daily changes of the magnetic field.
There is no need of using a second device to measure the Earth’s magnetic field daily variations when measuring in the GRAD mode. In the GRAD mode, the magnetic induction vector at the locations of each sensor is measured simultaneously. The gradient is determined by the subtraction of the two values.
The PMGTr application is supplied with the PMG-2 proton magnetometer and gradiometer. This application is used to transfer stored data to a computer and for a graphical display of the measured values of the magnetic field. The data can also be exported into a text file, which can then be used for further processing. The PMGtr application can also perform corrections of daily variations of the measured magnetic field.
The device is supplied in two variants:
Gradiometer is a fully equipped proton magnetometer and a gradiometer with two sensors to measure the gradient of the Earth’s magnetic field.
Magnetometer is a cheaper version that does not allow measurement of the gradient and is equipped with only one sensor.
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|Field range||20,000 – 100,000 nT (gammas)|
|Absolute accuracy||± 1 nT|
|Gradient range||1,000 nT/m|
|Measurement time||2 s (maximum)|
|Data memory||Internal flash memory, 24,500 readings|
|Display||LCD graphic 160 x 104|
|Keyboard||16 key, membrane type|
|Power source||Internal lead-acid (Pb) battery 12 V, 3.4 Ah|
|Battery life||5,000 readings on average in GRAD operation|
|Console dimensions||230 x 80 x 170 mm|
|Sensor dimensions||Ø80 x 200 mm|
|Console weight||3,2 kg including battery|
|Sensor weight||0,7 kg|
|Temperature range||-10°C to +60°C|
- Mineral exploration
- Ferrous ordnance detection
- Buried pipes location
- Environmental studies
- Console with built-in battery
- Two sensors with six sensor sticks
- Battery charger
- Anchor ring with ropes
- Tent pins
- Instruction manual
- Transport case
- USB cable
- USB FLASH memory with communication software for Windows