MARINE EXPLORATION
OBX-90
OBX-90: Ocean Bottom Recorder
PRODUCT DETAILS
The OBX-90 is designed for extended-duration seabed ocean bottom seismic data acquisition. Nodes can be deployed in depths exceeding 3,400 meters with continuous recording for up to 100 days.
FEATURES
- Continuous, cable-free 4C autonomous recording
- Battery module: 100 days
- Built-in, full-resolution test generator
- Solid-state flash memory: 16 GB per channel
- CSAC clock
GS-ONE OMNI Geophone
PHYSICAL SPECIFICATIONS
| Moving Mass | 13.2 g | 0.466 oz |
| Maximum coil excursion p-p | 4.06 mm | 0.16 in. |
| Minimum coil excursion p-p | 1.02 mm | 0.04 in. |
| Diameter | 30.5 mm | 1.2 in. |
| Height | 40.7 mm | 1.6 in. |
| Weight | 130 g | 4.60 oz |
| Operating and Storage Temperature Range | –40°C to +100°C | –40°F to +212°F |
ELECTRICAL SPECIFICATIONS
All parameters are specified with 7.5 kΩ load at 25°C in all tilt positions unless otherwise stated.
| Frequency | 15 Hz |
| Spurious Frequency | >160 Hz |
| Distortion at Horizontal | 0.05% Typical |
| Resistance with 7.5 kΩ load | 1450 Ω |
| Sensitivity at 70% Damping | 69.2 V/m/s (1.75 V/in/s) |
| Damping | 70% |
| Distortion at all tilt angles | <0.2% measured at 15 Hz with 0.2 in/s p-p |
Hydrophone Deepender™ 5000-X
PHYSICAL SPECIFICATIONS
| Maximum Operating Pressure | 34.5 MPa (5,000 psi) |
| Maximum Working Depth | 3450 m (11,319 ft.) |
| Operating Temperature Range1 | –10 to +75°C (+14 to 167°F) |
| Outside Diameter | 50.8 mm (2.0 in.) |
| Length | 38.1 mm (1.5 in.) |
ELECTRICAL SPECIFICATIONS
| Nominal Capacitance (at 25°C 1atm) | 20.0 nanofarads |
| Voltage Sensitivity2 | 4.0 μV/μBar |
| Sensitivity (dBv ref 1μPa @ 25°C) | –181.9 dB re 1nC/μPa +/- 1.5db |
| Frequency Response (into 2 MΩ load) | 3 –15,000 Hz |
MECHANICAL SPECIFICATIONS (Housing)
| Metric | US | |
| Length | 500 mm | 19.7 in. |
| Width | 215 mm | 8.48 in. |
| Height | 111 mm | 4.38 in. |
| Weight in Air | 17.0 kg | 37.5 lbs. |
| Weight in Seawater | 9.9 kg | 21.8 lbs. |
| Maximum Operating Pressure | 34.5 MPa/345 Bar | 5,000 psi |
| Maximum Operating Depth | 3,450 M | 11,316 ft. |
| Operating Temperature Range | –5°C to +35°C | +23°F to +95°F |
| Storage Temperature Range | –10°C to +40°C | +14°F to +104°F |
ELECTRICAL SPECIFICATIONS
Digitized 4C Recording Station: 4 Channel, 24 Bit A/D Digitizer 3C Orthogonal oriented GS-One OMNI 15 Hz Geophones 1 DEEPENDER Hydrophone
| Digitization | 24-bit Delta-Sigma |
| Sample Interval | 0.25, 0.5, 1, 2, 4 ms |
| Pre-amplifier Gains | 0, 6, 12, 18, 24, 30, 36 dB |
| Maximum Input Signal | 1.8 Vrms |
| Equivalent Input noise (@2ms sample interval) | 0.17 μVrms |
| Gain Accuracy | Better than 1% |
| Anti-alias Filter | 83% Nyquist |
| Instantaneous Dynamic Range | 124dB @ 2 ms sample interval |
| THD | <0.2% |
| Distance Between Digitizer & Farthest Sensor | <18 cm |
| Distance Between All Sensors | <13 cm |
| Flash Memory | 16 GB per channel |
| Frequency Response | 1 Hz – 1650 Hz @ ¼ ms sample interval |
| Battery Module | 100 days operation (optional 120 days operation) |
