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Easy to Use
Deploying Sentinel on the bottom of the ocean is just as easy as setting it up on land. Program Sentinel once in your office or lab. When you reach your deployment spot, just drop the unit into its tripod, and lower it to the sea bottom. An attachment point lets you tether a buoy for easy retrieval. -
Nothing is too deep
For extra-deep deployments, Sentinel can be used with an acoustic release system. Tether a buoy to the unit’s top, attach the other end to the release and a disposable anchor, and drop it overboard – no tripod required. When the acoustic release is signaled to detach, Sentinel floats to the surface for easy retrieval. -
Durable
Sentinel is designed to withstand years of exposure to even the harshest environments. The battery pack and omnidirectional Overhauser sensor are protected by a pressurized housing, made of high-strength fiberglass and coated with impact-absorbing polyurethane. -
High Performance
Sentinel’s sensitivity is state-of-the-art (0.015 nT), far superior to most traditional base station magnetometers, and its power requirement is orders of magnitude lower. Couple this with its enormous one million reading nonvolatile memory and you have an instrument that is capable of collecting months of high-resolution total field magnetometer data on a single battery charge. -
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Call Us
To discuss whether the Sentinel is the perfect fit for your application, please contact Gina Lopez: gina.lopez@marinemagnetics.com +1 (619) 655-0179
The Sea Sentinel comes with:
Sentinel Underwater Base Station System
Cylinder weight: 14 kgs (30 lbs)
BaseLINK Software for Windows
Interface Cable
86 g (0.19 lbs)
Universal AC Input Battery Charger
227 g (0.5 lbs)
Case
Empty Case: 17.5 kg (38.5 lbs)
Shipping Weight: 29 kg (63.9 lbs)
Sea Sentinel Includes
- Electronics module
- Overhauser sensor
- Onboard memory
| Performance | |
|---|---|
| Absolute Accuracy | 0.2 nT |
| Sensitivity | 0.015 nT (standard) 0.02 nT (optional) |
| Gradient Tolerance | > 10,000 nT/m |
| Range | 18,000 to 120,000 nT |
| External Trigger | by RS-232 |
| Temperature Drift | NONE |
| Dead Zone | NONE |
| Sampling Rates | 1/Minute to 2 Hz |
| Communications | RS-232, 9600bps |
| OPERATING PARAMETERS | |
|---|---|
| Magnetometer Cylinder Weight | 1000m: Air 17.4kg (38.3 lbs), Water -0.3kg (0.6 lbs) 3000m: Air 21.2kg (46.8 lbs), Water 2.8kg (6.2 lbs) 6000m: Air 23.5kg (51.5 lbs), Water 10.7kg (23.7 lbs) |
| Magnetometer Cylinder Size | 1000m: 5.00 x 44.70 in (12.7 x 113.5 cm) 3000m: 5.25 x 44.75 in (13.3 x 113.6 cm) 6000m: 5.75 x 45.00 in (14.6 x 114.3 cm) |
| Docking Base Weight | 5kg |
| Maximum Surface Incline Angle for Deployment on Tripod | 40 degrees |
| Magnetometer Cylinder Depth Rating | 1000m (Optional: 3000m, 6000m) |
| Operating Temperature | -25C to +60C |
| Storage Temperature | -60C to +70C |
| Communication | Full duplex, 3-wire RS232. 9600bps, 8 data bits, no parity, 1 stop bit |
| Storage Capacity | One million readings |
| Battery Pack | Gel cell 12V, 7Ah |
| Battery Charge Time | 5 hours 80% charge. 10 hours full charge. Can charge while sampling |
| Battery Life | 40 Hrs @ 1 Hz (1 sec interval) 55 Hrs @ 0.3 Hz (3 sec interval) 80 Hrs @ 0.2 Hz (5 sec interval) 185 Hrs @ 0.1 Hz (10 sec interval) 1185 Hrs @ 1/min (60 sec interval) |