Silicon_Audio_203-60_Specs_1.pdf
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- Attached to
- SILICON AUDIO BOREHOLE SENSORS Federal contract opportunity
- Solicitation number
- 140G0326Q0139
About this file
This is a technical product specification document for the Silicon Audio Low-Noise Optical Seismic Sensor, Model 203-60 (High Sensitivity) Borehole Sensor. The document describes a scientific-grade seismic sensor that integrates conventional geophone mechanics with innovative optical technologies for resource exploration and scientific discovery applications. The sensor is engineered to deliver superior signal-to-noise ratio and broadband response in a rugged, easy-to-deploy form factor with the largest dynamic range available among seismic sensors, eliminating the need for multiple sensors in applications that traditionally required paired broad-band seismometers and strong-motion accelerometers.
The Model 203-60 specifications include a passband of 0.005–1500 Hz with ultra-low noise ranging from 0.5 ng/√Hz at 10 Hz to 10 ng/√Hz at 0.01 Hz, a dynamic range of 172 dB at 1 Hz, sensitivity of 60 V/g, and a clip level of ±0.5 g peak. Key operational characteristics include shock tolerance exceeding 1500 g, tilt tolerance of ±15° (up to 180° available), operating temperature range of –35°C to +75°C, and power consumption of 150 mW for the 3-axis sensor configuration (80 mW with reduced clip level). The sensor features a borehole package measuring 2.0 inches diameter by 14.5 inches length, weighing 1 kg, with automatic mass centering and force balance technology using an interferometric transducer. Supply voltage requirement is 6–25 V DC, distortion is less than 0.03% at 12 Hz, and no mass lock is required for transport.
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Text version
Silicon Audio Low-Noise Optical Seismic Sensor
Silicon Audio integrated the mechanics of conventional geophones with innovative optical technologies to create a scientific-grade seismic sensor with unparalleled characteristics and performance for resource exploration and scientific discovery. The sensor delivers superior signal-to-noise ratio and broadband response in a rugged, easy-to-deploy form factor. Developed originally for ocean-bottom exploration, the sensor has been deployed around the world in a wide variety of seismic applications and is available in various packaging configurations. With the largest dynamic range available among seismic sensors, the Silicon Audio sensor eliminates the need for multiple sensors to maximize the signal capture in terms of seismic amplitude and bandwidth. For example, applications which once required a broad-band seismometer paired with a strong-motion accelerometer can be addressed with a single Silicon Audio sensor.
Performance Attributes:
• Ultra-low noise and low frequency.
• High shock tolerance.
• Wide bandwidth and dynamic range.
• Bridges weak- and strong-motion applications.
• Low cross-axis sensitivity.
• Low power design.
• Very large tilt tolerance.
• High clip levels and low distortion levels.
• High linearity across full bandwidth.
• High vector fidelity.
• Small, lightweight, rugged form factor.
• Customizable packaging/configuration
Model 203-60 (High Sensitivity) Borehole Sensor Specifications
Sensor Performance
Passband
• 0.005 – 1500 Hz
Noise
• 0.5 ng/√Hz at 10 Hz
• 0.8 ng/√Hz at 1 Hz
• 3 ng/√Hz at 0.1 Hz
• 10 ng/√Hz at 0.01 Hz
Clip Level
• ±0.5 g peak
Dynamic Range (at 1 Hz over 1 Hz BW)
• 172 dB
Sensitivity
• 60 V/g
Max Vout
• 60 V pk-pk
Spurious Resonance
• > 600 Hz
Tilt Tolerance
• ±15° (higher tilts available up to 180°)
Distortion
• < 0.03% at 12 Hz and 0.7 in/s pk-pk
Power
Power Consumption
• 150 mW for 3-axis sensor (as low as 80 mW with reduced clip level)
Supply Voltage
• 6–25 V DC
Handling
Transport
• No mass lock required for transport
Shock Tolerance
• > 1500 g (0.5 ms ½-sine)
Operating Temperature
• –35 °C to +75 °C (polar-rated sensors available)
General
Dimensions
• Borehole package: 2.0" Diameter × 14.5" Length (51 mm D × 368 mm L) — Mass: 1 kg
Configuration
• 3-axis
Sensing Method
• Force balance with interferometric transducer
Mass Centering
• Automatic
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