GL-CS2
Short Period Seismometer
Main application fields:
1. Natural Earthquake Observation of Regional Seismic Network;
2. Reservoir Induced Earthquake Monitoring;
3. Mine Seismic Monitoring;
4. Microseismic observation such as oil and gas exploration.
OVERVIEW
Description
The GL-CS2 seismometer is a three-component integrated electronic feedback short-period seismometer with high sensitivity and wide dynamic range. The device features an integrated three-component structure where the EW, NS, and UD sensitive axes are mutually orthogonal, forming a three-dimensional measurement coordinate system. The GL-CS2 seismometer employs electromagnetic velocity conversion and force-balanced electronic feedback technology, with an observation frequency band of 0.5Hz to 50Hz. The electronic feedback technology enhances the seismometer’s dynamic range while reducing nonlinear distortion. The electronic feedback circuit, DC power converter circuit, and mechanical pendulum are housed within a sealed enclosure for easy operation and maintenance. The GL-CS2 incorporates external three-component open-locking pendulum mechanisms for unlocking the EW, NS, and UD axes during transportation and use, significantly improving the GL-CS2 short-period seismometer’s impact resistance. It features a precision horizontal bubble and easily recognizable north-south orientation indicator, with IP67 waterproof rating.
Spectrum Characteristic Curve

Self-Noise Curve

Technical Parameter
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Sensitivity: 2000 V/(m/s) (balanced output at both ends)
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Bandwidth: 0.5 Hz~50Hz (-3dB)
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Maximum output signal: ±10 V
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Structure: three-way integration, electromagnetic transduction, force balance and electronic feedback
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Weight: About 5kg
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Dynamic range: >130dB (1-10Hz)
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Linearity error: <0.1%
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Minimum parasitic resonance frequency: >130 Hz
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Horizontal sensitivity ratio: <1%
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Calibration coil resistance: 70Ω
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Power supply: +11 V~+15V
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Working environment: temperature -20℃~60℃; humidity 98%
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Shape and size: maximum outer diameter ~140mm, maximum height ~225mm
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The external lock lever is easy to maintain and has strong anti-transportation ability















