SEP Geophysical Acquires Sensys R4 Magnetometer for UAV Surveys

SEP Geophysical Advances Survey Capabilities with Sensys R4 Magnetometer Acquisition

In a strategic move to enhance its geophysical survey capabilities, SEP Geophysical has recently acquired the Sensys R4 Magnetometer, also known as the MagDrone R4. This ultra-lightweight airborne magnetometer can be attached to any Unmanned Aerial Vehicle (UAV) or drone capable of carrying a payload of over 3 kg.

The MagDrone R4 is celebrated for its portability, versatility, and cutting-edge design, which includes a carbon fibre sensor tube with two built-in sensors and a folding mechanism for easy transportation. It's an ideal tool for various applications, including general purpose surveys, scientific magnetic cartographies, mine exploration, and safety-relevant surveys.

Owning this equipment allows SEP Geophysical to bolster its competitiveness in conducting medium to large open area magnetic surveys. The integration of the MagDrone R4 with a precise altimeter enables high-quality airborne surveys, providing a level of data acquisition comparable to other commercially available magnetometers.

"The Sensys R4 Magnetometer is more than just a new tool for us at SEP Geophysical—it's a game changer. It opens up a world of possibilities for conducting medium to large open area magnetic surveys with greater efficiency and precision. As we integrate this advanced technology into our operations, we're not just staying competitive — we're setting new standards in geophysical surveying," -  Tom Smith, Director at SEP Geophysical.

SEP Geophysical extends its gratitude to its supplier, JBAus, and Jonathan Brindley, a respected figure in the UAV community, for their ongoing support and collaboration. We look forward to continuing working together to push the boundaries of geophysical surveying. 

In the coming weeks, tests will be performed with the MagDrone R4 offering an opportunity to capture images of this innovative technology in action. Updates and insights into this work will be shared on our LinkedIn page.

For more information, please contact us directly at info@sepgeophysical.com.

Frequently Asked Questions (FAQs)

What is the Sensys MagDrone R4?

The MagDrone R4 is an ultra-lightweight airborne magnetometer featuring five triaxial Fluxgate sensors. Designed for UAV-based surveys, it excels in applications such as UXO detection, archaeological surveys, and environmental monitoring. The system provides high precision in mapping the Earth's magnetic field, particularly the spatial geometry of subsurface anomalies, though its performance depends on factors like calibration and environmental conditions.

How does the MagDrone R4 measure magnetic fields?

The MagDrone R4 uses high-sensitivity Fluxgate magnetometer sensors to measure variations in the Earth's magnetic field. It features automatic hemisphere switching, which optimises its orientation during flight for consistent and accurate data collection.

What makes the MagDrone R4 unique?

Key features of the MagDrone R4 include:

• Foldable carbon fibre sensor tube with adjustable spacing (25 cm or 50 cm) for flexible survey configurations.
• A 200 Hz sampling rate, which minimises interference from UAV motors and electronics.
• Compatibility with fixed-wing UAVs, helicopters, and multi-rotor drones.
• Internal server with 8 GB of memory for efficient data recording and management.
• Compact and portable design for easy transport and field deployment.

While the MagDrone R4 provides the highest sensitivity in its class, achieving optimal results requires proper setup and calibration tailored to survey conditions.

What types of UAVs are compatible with the MagDrone R4?

The MagDrone R4 can be mounted on UAVs with a payload capacity of at least 3 kg. It is optimised for DJI M300 and M350 RTK models but can also be used with fixed-wing aircraft and helicopters for broader survey applications.

What is the range of applications for the MagDrone R4?

The MagDrone R4 is versatile and suitable for:

• UXO (Unexploded Ordnance) detection
• Archaeological surveys
• Detection of small metal objects underground
• Mineral exploration
• General magnetic cartography
• Environmental monitoring

Its ability to detect subsurface structures and faults makes it valuable for geophysical and safety operations, including scanning for unexploded ammunition or buried objects in inaccessible areas.

How is survey data processed?

Data collected by the MagDrone R4 is processed using the MagDrone DataTool software, which supports filtering, compensation, and exporting. For advanced analysis, the system integrates with MAGNETO® software, providing detailed visualisations of subsurface geology and anomalies.

Key specifications include:

• Measurement range: ±75,000 nT.
• Area coverage: 3–4 hectares per hour.
• Recommended flight altitude: 1 metre or lower for tasks like UXO detection.

The system ensures reliable operations in diverse environments and challenging terrains