Marine Magnetics Device / Instrument
SeaSPY2
Omnidirectional Overhauser marine magnetometer with 0.1 nT absolute accuracy and no dead zones or heading error, offered as single sensor or horizontal or longitudinal gradiometer.
Description
SeaSPY2 is a towed marine magnetometer with a custom omnidirectional tuned Overhauser sensor. It has no dead zones, heading error or warm-up, gives identical data from -40ºC to +60ºC, and its sensitivity has been independently tested by INTERMAGNET.
Key features
- Absolute accuracy 0.1 nT; sensitivity 0.01 nT (0.02 nT optional); resolution 0.001 nT
- Range 18,000 nT to 120,000 nT; sampling rates 4 Hz - 0.1 Hz
- Depth ratings of 1000 m, 3000 m and 6000 m
- 1 W standby, 3 W maximum; deployable by one person
- Integrated leak detection and automatic power cutoff; optional pressure sensor and altimeter
Applications
- SeaSPY2: precise deep offshore surveys
- SeaSPY2 H-Grad: rigid-frame (1.6 x 0.35 m) horizontal gradiometer for cable and pipeline tracking and real-time detection of small ferrous targets
- SeaSPY2 L-Grad: longitudinal gradiometer with a 1.5 m to 500 m baseline for wreck, salvage, environmental and exploration surveys
Specifications
| Length | 119 cm |
|---|---|
| Diameter | 7.6 cm |
| Weight in air | 12 kg |
| Weight in water | 3.5 kg |
| Absolute accuracy | 0.1 nT |
| Sensitivity | 0.01 nT (0.02 nT optional) |
| Resolution | 0.001 nT |
| Range | 18,000 nT to 120,000 nT |
| Sampling rates | 4 Hz – 0.1 Hz |
| Depth ratings | 1000m, 3000m, 6000m |
| Power consumption | 1 W standby, 3 W maximum (+2 W with altimeter) |
| Communication | RS-232, 9600 bps |
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