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
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Moving Mass
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13.2 g
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0.466 oz
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Maximum coil excursion p-p
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4.06 mm
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0.16 in.
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Minimum coil excursion p-p
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1.02 mm
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0.04 in.
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Diameter
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30.5 mm
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1.2 in.
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Height
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40.7 mm
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1.6 in.
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Weight
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130 g
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4.60 oz
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Operating and Storage Temperature Range
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–40°C to +100°C
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–40°F to +212°F
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Electrical Specifications
All parameters are specified with 7.5 kΩ load at 25°C in all tilt positions unless otherwise stated.
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Frequency
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15 Hz
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Spurious Frequency
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>160 Hz
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Distortion at Horizontal
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0.05% typical
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Resistance with 7.5 kΩ load
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1450 Ω
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Sensitivity at 70% Damping
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69.2 V/m/s (1.75 V/in/s)
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Damping
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70%
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Distortion at all tilt angles
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<0.2% measured at 15 Hz with 0.2 in/s p-p
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Hydrophone Deepender™ 5000-X
Physical Specifications
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Maximum Operating Pressure
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34.5 MPa (5,000 psi)
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Maximum Working Depth
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3450 m (11,319 ft.)
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Operating Temperature Range
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–10 to +75°C (+14 to 167°F)
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Outside Diameter
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50.8 mm (2.0 in.)
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Length
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38.1 mm (1.5 in.)
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Electrical Specifications
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Nominal Capacitance (at 25°C 1atm)
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20.0 nanofarads
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Voltage Sensitivity
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4.0 μV/μBar
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Sensitivity (dBv ref 1μPa @ 25°C)
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–181.9 dB re 1nC/μPa +/- 1.5db
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Frequency Response (into 2 MΩ load)
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3 –15,000 Hz
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Mechanical Specifications (Housing)
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Metric
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US
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Length
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500 mm
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19.7 in.
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Width
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215 mm
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8.48 in.
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Height
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111 mm
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4.38 in.
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Weight in Air
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17.0 kg
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37.5 lbs.
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Weight in Seawater
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9.9 kg
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21.8 lbs.
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Maximum Operating Pressure
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34.5 MPa/345 Bar
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5,000 psi
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Maximum Operating Depth
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3,450 M
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11,316 ft.
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Operating Temperature Range
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–5°C to +35°C
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+23°F to +95°F
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Storage Temperature Range
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–10°C to +40°C
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+14°F to +104°F
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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
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Digitization
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24-bit Delta-Sigma
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Sample Interval
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0.25, 0.5, 1, 2, 4 ms
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Pre-amplifier Gains
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0, 6, 12, 18, 24, 30, 36 dB
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Maximum Input Signal
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1.8 Vrms
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Equivalent Input noise (@2ms sample interval)
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0.17 μVrms
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Gain Accuracy
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Better than 1%
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Anti-alias Filter
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83% Nyquist
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Instantaneous Dynamic Range
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124 dB @ 2 ms sample interval
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THD
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<0.2%
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Distance Between Digitizer & Farthest Sensor
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<18 cm
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Distance Between All Sensors
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<13 cm
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Flash Memory
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16 GB per channel
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Frequency Response
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1 Hz – 1650 Hz @ ¼ ms sample interval
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Battery Module
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100 days operation (optional 120 days operation)
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