Marine Magnetics Device / Instrument
Explorer
Small, light high-sensitivity Overhauser magnetometer (4.5 kg) without export restrictions, with 2 W power draw; AUV version is neutrally buoyant.
Description
Explorer is a compact, high-sensitivity Overhauser magnetometer that Marine Magnetics describes as the world's smallest and lightest without export restrictions. At 4.5 kg it can be handled by one person, and it suits inshore shallow-water work or offshore towing behind side scans, AUVs and ROVs.
Key features
- Tuned Overhauser sensor with no dead zones, no realignment and no consumable parts
- Absolute accuracy 0.1 nT; sensor sensitivity 0.02 nT
- 2 W power draw, up to 200 hours on a single car battery
- 1000 m depth rating
- Explorer AUV version: neutrally buoyant, 3.86 kg in air, RS-232 connection to most AUV/ASV systems
Applications
Shallow-water and towed magnetic surveys and AUV integration; Teledyne Gavia has integrated Explorer with the Gavia AUV.
Specifications
| Length | 86 cm (AUV: 89.2 cm) |
|---|---|
| Diameter | 7.6 cm |
| Weight | 4.5 kg (AUV: 3.86 kg) |
| Absolute accuracy | 0.1 nT |
| Sensor sensitivity | 0.02 nT |
| Counter sensitivity | 0.001 nT |
| Range | 18,000 nT to 120,000 nT |
| Sampling rates | 4 Hz – 0.1 Hz |
| Power consumption | 2 W |
| Depth rating | 1000m |
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