Marine Magnetics Device / Instrument
Argos
Diver-held or ROV-mounted single-sensor gradiometer for last-metre target guidance, with 5 nT/m gradient sensitivity and 100 m depth rating.
Description
Argos is a handheld total-gradiometer, described by Marine Magnetics as the world's first. Divers use it, or it can be mounted on an ROV, to pinpoint targets found by a magnetometer survey, working through sediment and low visibility where metal detectors fail.
Key features
- Gradient sensitivity 5 nT/m; range 18,000 nT to 120,000 nT; sampling 1-5 Hz
- Real-time gradient tracking with LEDs, in-ear tones and a digital topside output
- Detection range from about 1 m for large ammunition to 5 m for an anchor
- Neutrally buoyant at depth (-11 g in water); 100 m depth rating
- About 15 hours battery life; Argos Monitor software for live data and diagnostics
Applications
Last-metre target guidance for diver and ROV investigation of magnetic anomalies.
Specifications
| Length | 71.2 cm |
|---|---|
| Diameter | 7.6 cm |
| Weight in air | 3 kg |
| Weight in water | -11 g |
| Gradient sensitivity | 5 nT/m |
| Range | 18,000 nT to 120,000 nT |
| Sampling rates | 1 Hz – 5 Hz |
| Depth rating | 100 m |
| Battery life | ~15 hours |
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