Magnetometer
Detect Hidden Metal Objects Below the Seabed
What is a Magnetometer?
A Magnetometer is a survey instrument that detects metal objects buried under the seabed or underground. It measures small changes in the Earth’s magnetic field caused by iron or steel objects.
It helps surveyors find objects that cannot be seen from the surface.
Why is a Magnetometer Important?
Before starting marine construction, dredging, or pipeline installation, engineers need to know if there are any hidden metal objects on or below the seabed.
A Magnetometer helps locate these objects before work begins, making the project safer and reducing unexpected delays.
How Does It Work?
A Magnetometer works in a few simple steps.
- The sensor is towed behind a survey vessel or USV.
- It continuously measures the Earth’s magnetic field.
- When it passes over a metal object, the magnetic field changes.
- The system records the location of the change.
- Survey software displays the position of the detected object on a map.
Main Parts
A Magnetometer survey system usually includes:
- Magnetometer Sensor
- Tow Cable
- GNSS Receiver
- Survey Vessel or USV
- Survey Computer
- Data Logger
- Survey Software
What Can It Detect?
A Magnetometer can detect many buried or underwater metal objects, including:
- Pipelines
- Power Cables
- Shipwrecks
- Anchors
- Steel Drums
- Chains
- Unexploded Ordnance (UXO)
- Iron Debris
Where is it Used?
Magnetometers are commonly used for:
- Geophysical Surveys
- Pipeline Route Surveys
- Cable Route Surveys
- Offshore Wind Farm Projects
- Harbor Development
- Dredging Projects
- Marine Construction
- Shipwreck Investigation
- UXO Surveys
- Environmental Studies
Benefits
- Finds buried metal objects
- Improves survey safety
- Covers large areas quickly
- High detection accuracy
- Easy to combine with other survey equipment
- Saves time before construction starts
Quick Facts
| Feature | Information |
|---|---|
| Measures | Magnetic Field |
| Detects | Buried Metal Objects |
| Used In | Marine & Land Surveys |
| Works With | Survey Vessel or USV |
| Main Purpose | Find Hidden Metal Objects |
Frequently Asked Questions
What does a Magnetometer detect?
It detects metal objects that are buried underground or below the seabed.
Can it find pipelines?
Yes. It is commonly used to locate steel pipelines and cables.
Is it used underwater?
Yes. It is widely used in hydrographic and geophysical surveys.
Related Equipment
Side Scan Sonar
Sub Bottom Profiler
ADCP
GNSS Receiver
Survey Vessel
USV