GL-WS60/120 Low-Noise Broadband Seismometer
GL-WS60/120 Low-Noise Broadband Seismometer is engineered for high-precision seismic monitoring across a wide frequency range. It delivers exceptional stability, sensitivity, and low self-noise, making it ideal for both portable and permanent installations.
OVERVIEW
Description
GL-WS60/120 Broadband Seismometer
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High-Sensitivity Broadband Sensor: Designed for precise wide-band seismic monitoring and structural vibration analysis.
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Three-Axis Configuration: Integrates one vertical and two horizontal orthogonal sensors for complete motion detection.
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Advanced Electronics: Built-in electronic feedback circuits, control modules, power conversion circuits, and auto-calibration systems for stable, accurate operation.
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Force-Balanced Feedback Technology: Utilizes precision capacitive displacement transducers for ultra-low noise, high signal stability, and wide dynamic range.
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Remote Control Capability: Includes motorized zero-adjustment and remote calibration coils for easy alignment, calibration, and diagnostics.
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Automatic Initialization: Begins operation immediately upon power-up—no manual setup required.
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Compact & Energy-Efficient: Lightweight, low-power design ensures easy transport, simple installation, and field deployment flexibility.
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Reliable & Maintenance-Free: Built for long-term use in seismic observatories, geotechnical monitoring, and earthquake research applications.
Specifications
Technical Specifications
Structure:
Three-axis integrated installation featuring displacement transduction and force-balance electronic feedback design.
Frequency Bandwidth:
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GL-WS60: 0.0167 Hz – 50 Hz
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GL-WS120: 0.0083 Hz – 50 Hz
Sensitivity:
2000 V / (m/s) (differential balanced output)
Maximum Output Signal:
± 20 V (balanced output)
Dynamic Range:
140 dB
Self-Noise Level:
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GL-WS60: 0.01 Hz – 10 Hz – below NLNM
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GL-WS120: 0.00625 Hz – 10 Hz – below NLNM
Output Impedance:
100 Ω
Lateral Vibration Suppression:
< 1%
Calibration Function:
100 mA (max.); calibration sensitivity = 10 m/s²/A
Minimum Parasitic Resonance Frequency:
100 Hz
Static Current Consumption:
90 mA
Power Supply Voltage:
12 V DC
Operating Environment:
Temperature: –20 °C to +40 °C | Humidity: ≤ 98%
Dimensions:
Maximum diameter ≈ 240 mm | Maximum height ≈ 270 mm
Weight:
≈ 12 kg (seismometer only); ≈ 16 kg (including protective packaging)
APPLICATIONS
Main Application Areas:
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Emergency mobile seismic observation
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Earthquake research and scientific investigation
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Earthquake early warning and monitoring systems
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Landslide and rockfall detection
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Reservoir-induced seismicity monitoring
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Coal mine seismic monitoring
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Oilfield seismic monitoring
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National and regional seismic networks
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Natural earthquake observation stations
PERFORMANCE CURVES
Wideband ground meter GL-WS60 24-hour self-noise and its total average curve

Very broadband seismograph GL-WS120 and Beijing port main seismometer noise summary














