The S-100 Wideband Seismic Sensor (Surface Type)
The S-100 is a three-component, velocity-equivalent output seismic sensor. The unit is ideal for local and regional seismicity and microseismicity monitoring, as well as for induced microseismicity monitoring.
Additional Details
The design is based on the force balance principle. Using three geophone elements, the bandwidth is extended to a lower frequency than the original geophone’s natural frequency. Three generations of the S-100 sensor have been implemented. Several low and upper corner frequencies are provided through different sensor configurations. Therefore, 10s, 5s, 2s, and 1s low-cut frequency corners are available, as well as 50, 80, and 98 Hz high-cut frequency corners. The sensitivity is 1000 V/m/s for the Mk1 version, while it has been increased to 1500 V/m/s for the Mk2 and Mk3 versions.
The surface type has similar characteristics to the borehole type. No mass lock or centering is required, which makes an easy connection with the digitizer. The settling time of the unit is very short, only thirty seconds. Sensitivity is 1500 V/m/s (differentially), thus providing a very sensitive seismic unit. A test line is also provided for calibration and testing.
Features
- Three-axis wide-band response (10 sec – 98 Hz) seismic sensor
- Designed according to the force balance principle
- High sensitivity 1500 V/m/s
- Ultra-low power consumption
- Surface type
- Velocity feedback design
- Built-in self-test function