GL-WS360
Low-Noise Ultra Broadband Seismometer
Main application fields:
The national seismic network, the national seismic station and the regional seismic network are broadband natural .It is suitable for long-term fixed observation in the field of earthquake observation and underground structure imaging, where the observation conditions are very good and the environmental noise isvery low.
OVERVIEW
Description
The GL-WS360 Seismometer is a broadband, high-sensitivity seismometer with an extensive dynamic range and highly stable transfer function, ideal for wide-band seismic monitoring. This instrument features three independently oriented sensors (one vertical and two horizontal) integrated into a single unit, equipped with built-in electronic feedback circuits, control modules, power conversion circuits, and calibration systems. Utilizing precision capacitive displacement transducers and force-balanced electronic feedback technology, it delivers low noise levels and exceptional dynamic range. The device incorporates a motorized zero-adjustment mechanism for remote monitoring and calibration, while its built-in calibration coil enables remote calibration functions. It automatically starts oscillating upon power-up and boasts a compact design with low power consumption, making it easy to transport, install, and operate.
GL-WS360 seismometer 24-hour self-noise and its average value curve

Technical Parameter
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Hanging structure: Three-way UVW symmetric structure
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Bandwidth: 0.0028 Hz ~ 50 Hz
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Output sensitivity: 2000 Vs/m ±2% (differential output)
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Maximum output signal: ±20 V (differential output)
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Maximum speed limit: 10 mm/s
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Dynamic range: >150 dB (0.01 ~ 0.05 Hz); >160 dB (1.0 ~ 10 Hz)
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Linearity error: Better than 0.1%
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Output current: >5 mA
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Output resistance: <100 Ω
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Load capacitance: >0.01 μF
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Sensitivity: 10 m/s²/A
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Zero adjustment function: Automatically zeroes when powered on; supports remote start zero adjustment, range ±1°
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Power supply range: +9 ~ +30 VDC (nominal +12 VDC, single power supply)
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Parasitic resonance: >80 Hz
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Horizontal ratio: Better than 1%
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Average power consumption: <0.8 W
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Control function: Automatic zero adjustment when powered on; supports remote zero adjustment and remote lock swing (with +12 VDC supply)
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Total harmonic distortion: Better than 0.1%
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Calibration function: Three independent calibration coils, relay-controlled on/off
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Relative humidity: 0 ~ 98%
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Self-noise: 0.005 Hz ~ 10 Hz is lower than the latest NLNM (New Low Noise Model); 100s self-noise level = –185 dB
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Weight (bare unit): ~13 kg
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Size: Ø230 × 225 mm (without foot); ~Ø230 × 240 mm (with foot)
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Temperature range (operation): –25 ~ +60 °C
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Temperature range (storage): –55 ~ +80 °C
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Protection rating: IP67















