Marine Magnetics Magnetometer MariMag Magnetometer Marine Magnetometer Ocean Magnetometer Digital Sea Magnetometer Underwater Magnetometer
The Marine Magnetometer is an underwater magnetic survey system specifically designed for ship-towed applications, offering the advantages of low cost, high performance, and compact size. The system is equipped with dedicated PC software that enables real-time acquisition, recording, and intuitive display of magnetic field strength data and GPS positioning information.
The system uses the GD-01 optically pumped magnetometer as its core sensor and features a built-in HM-01 frequency counter module, supporting flexible sampling rate configuration with a maximum of 10 Hz. The GD-01U model has a maximum operating depth of 400 meters, with a system sensitivity better than 4 pT/√Hz and an effective magnetic field measurement range of 20,000 nT to 100,000 nT.
The GD-01U system is particularly suitable for the detection and high-precision mapping of underwater ferromagnetic targets. Typical applications include: anchors and chains, subsea cables and pipelines, ballast stones, scattered wreckage from sunken ships, various types of unexploded ordnance (UXO), wreckage from crashed aircraft and engines, as well as other magnetic objects. When the sensor is positioned close to the seabed and within the effective detection range, the system delivers extremely high resolution, enabling precise identification of even minute targets such as a screwdriver just 5 inches long.
| Working principle |
Self-excited cesium optically pumped magnetometer |
| Measuring range |
20000nT to 100000nT |
| Sensitivity |
4pT/Hz1/2 |
| Operation area |
The angle between the earth's total magnetic field and the sensor axis is greater than 10° |
| Steering error |
Less than 2nT |
| Absolute accuracy |
Less than 2nT |
| Output |
RS-232(600-9600Baud) |
| Mechanical |
| Towfish |
1.48m long, weighs 18.9kg (including housing, sensor, electronic unit and 1 main counterweight). |
| Towing cable |
Kevlar reinforced multi-layer traction cable, breaking strength 1.6t, outer diameter 12mm. |
