S-100 Wideband Seismic Sensor (MK3 Version)
The S-100 MK3 (third generation) is a three-component, velocity output, seismic sensor. The design is based on the force balance principle using three simple geophone elements, allowing the frequency bandwidth to be extended from 90 Hz down to 0.1 Hz. The default cable length between the sensor casing and the electronics box is approximately 20 meters, but it can be extended up to 150 meters.
Additional Details
The sensing elements are housed in the same 50 mm casing making a solid waterproof sensor suitable for installation into boreholes, where the noise is much less than at the surface. The elements are oriented according to the three-axis principle. A dot mark, incised on the plastic cover of the case, indicates the North direction. A surface-mount sensor package is also available.
An advanced signal conditioner circuit controls the sensor. It supplies current to the geophones, forcing them to vibrate constantly at different frequencies. The signal conditioner circuit is fully protected against overvoltage, opposite power supply polarity, and inductive lighting currents. When inactive, it enters the “power-off” mode to reduce the system’s power consumption.
Features
- Three-axis wideband response (10 sec – 98 Hz) seismic sensor
- Designed according to the force balance principle
- High sensitivity 1500 V/m/s, ultra-low power consumption
- Borehole type, 50 mm diameter, elastic packer mounting
- Typical 20 m cable length, optional up to 150 m
- Built-in self-test function.