Description
Model: ESDA-120S
Three-Component Broadband Feedback Seismometer
The Encardio-rite ESDA-120S is a high-precision, low-noise, three-component broadband seismometer designed for recording ground motion and vibration over a wide frequency range. It provides velocity output with exceptional linearity and stability, making it ideal for seismic, structural, and geophysical monitoring applications.
This broadband feedback seismometer is built around orthogonal three-axis low-noise sensor modules, utilizing a double nested feedback loop topology for enhanced dynamic performance and minimal distortion. The mechanical suspension system is based on the principles of “elastica”, which ensures excellent linearity, minimal hysteresis, and stable operation even under varying environmental conditions.
The ESDA-120S employs a non-Galperin sensor configuration with cross-axis rejection better than −75 dB, ensuring high-fidelity three-dimensional motion detection. It combines compact design, rugged mechanical construction, and advanced internal feedback electronics for precise seismic measurements from microtremor studies to strong-motion events.
Specifications
| Parameter | Description |
|---|---|
| Instrument type | Three-component broadband seismometer |
| Sensor principle | Feedback velocity transducer with double nested feedback loop |
| Number of components | 3 orthogonal (non-Galperin configuration) |
| Cross-axis rejection | Better than −75 dB on all axes |
| Suspension system | Based on elastica principle for superior linearity and low hysteresis |
| Output | Velocity (broadband) |
| Frequency range | Broadband, optimized for low-noise performance (customizable as per application) |
| Dynamic range | High (> 140 dB typical, depending on configuration) |
| Noise level | Ultra-low, suitable for broadband seismic and structural applications |
| Construction | Precision-engineered, rugged, sealed housing for field deployment |
| Orientation | Non-Galperin, orthogonal three-axis configuration |
| Applications | Seismic, geophysical, and structural vibration monitoring |
