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Ideal For
Rigid frame gradiometers are best suited for short-baseline applications where relative positional accuracy is key. Each towfish can be used as a single magnetometer. -
Detection of Small Ferrous Targets
Short-baseline gradient, whether measured in transverse or longitudinal direction, is useful for eliminating geological and diurnal interference, and providing data in real time so that recovery efforts can be started while the survey is in progress, rather than waiting for the total field data to be processed. -
Cable and Pipeline Survey
A horizontal transverse gradiometer can be effectively used to track cables or pipelines in real time from relatively high towing altitudes. The addition of vertical gradiometer data allows accurate measurement of cable/ pipeline burial depth (see SeaQuest Multi Sensor Gradiometer brochure). -
Sleeker, stronger
V2 update: Our new anodized frame is a sleeker design that reduces drag by a factor of 10. It’s lighter to carry on land but actually stronger. -
How It Works
A gradiometer measures magnetic gradient in one dimension by subtracting the difference between two independent sensors. Since the Earth’s magnetic field is three dimensional, up to three independent gradient directions can be measured. For information on how to collect data in all 3 gradients simultaneously, see our SeaQuest Gradiometer. -
Certification
Don’t just take our word for it. We put our sensors under scrutiny, through rigorous independent testing, by a world authority belonging to INTERMAGNET. Intermagnet is the global network of observatories, monitoring the Earth’s magnetic field. The tests confirm our specifications: 0.01nT/Hz; counter sensitivity is 0.001nT. -
Call Us
To discuss whether the SeaSPY2 Horizontal Gradiometer is the perfect fit for your application, please contact Gina Lopez: gina.lopez@marinemagnetics.com +1 (619) 655-0179
The SeaSPY2 Horizontal Transverse Gradiometer v.2 comes with:
SeaSPY2 Horizontal Transverse Gradiometer v.2 Includes
- Overhauser sensor
- Electronics module with Larmour counter
- Leak detector
- Depths ratings: 1000m (1500 psi), 3000m (5000 psi), 6000m (9000 psi)
| Performance | |
|---|---|
| Operating Zones | Worldwide. SeaSPY2 grad collects accurate results regardless of how it’s pointed in relation to Earth’s magnetic field. |
| Absolute Accuracy | 0.1 nT |
| Sensor Sensitivity | 0.01 nT |
| Counter Sensitivity | 0.001 nT |
| Resolution | 0.001 nT |
| Dead Zone | NONE |
| Heading Error | NONE |
| Temperature Drift | NONE |
| Power Consumption | 1 W standby, 3 W maximum, +2 W with altimeter |
| Range | 18,000 nT to 120,000 nT |
| Gradient Tolerance | Over 10,000 nT/m |
| Sampling Range | 4 Hz – 0.1 Hz |
| Communications | RS-232, 9600 bps |
| Power Supply | 24VDC (120-240 VAC compatible) (Acceptable range 9-30 VDC for single SeaSPY, 20-30V for gradiometers) |
| Magnetometer | |
|---|---|
| Towfish Length | 119 cm (47 in), + 10 cm (4 in) altimeter, + 5 cm (2 in) gradiometer |
| Diameter | 7.6 cm (3 in) |
| Weight in Air | 12 kg (27 lbs); 12.8 kg (28.5 Ibs) with altimeter |
| Weight in Water | 3.5 kg (7.8 lbs); 4 kg (8.8 lbs) with altimeter |
| Tow Cable | |
|---|---|
| Conductors | Twisted pair |
| Breaking Strength | 2,500 kg (5,500 lbs) |
| Outer Diameter | 1 cm (0.4 in) |
| Weight in Air | 125 g/m (8.4 lb/100 ft) |
| Weight in Water | 44 g/m (3 lb/100 ft) |
| Cable Termination | Field Replaceable |
| Floatation Cable | |
|---|---|
| Conductors | Twisted pair |
| Breaking Strength | 2,500 kg (5,500 lbs) |
| Outer Diameter | 1.9 cm (0.74 in) |
| Weight in Air | 125 g/m (8.4 lb/100 ft) |
| Weight in Water | -20 g/m (0.03 lbs/ft) |
| Cable Termination | Field Replaceable |
| Y-split Cable | |
|---|---|
| Length | 2.5m (8.2 ft) |
| Weight | 3.8 kg (8.4 lbs) |
| Gradiometer Frame | |
|---|---|
| Dimensions | 1.6 x0.35 m (63 x14 in) |
| Weight | 10.4 kg (22.9 lbs) |
Side Scan
Integrations for SeaSPY2, SeaQuest and Explorer
AUV Towed Integration
Using high sensitivity Overhauser technology for unmatched accuracy, low noise and power, our products are ideal to integrate with AUVs.