GEOtiny is a compact miniature digital seismometer which integrates three seismic and three acceleration channels. It supports high resolution 24bit digitizer, embedded linux OS and GPS or NTP timing. Seedlink server ensures reliable real time data telemetry while large storage volume ensures long period local data recording. The instrument has very low power consumption so it can operate getting powered from a small 12V DC battery. Due to its small size provides the ability to be buried underground. Modular sensor interface allows the user to select between a variety of sensor types and frequency corners (10sec, 5sec, 2sec, 1sec, 2Hz, 4,5Hz), thus covering the short period and wide band seismic range. Design simplicity is the great advantage and it is reflected to the price which is only fraction of the common commercial seismometers. The user is able to deploy even 100% more units than using common seismometers at same cost.

The S-100 MK3 (third generation) is a three-component velocity output seismic sensor. The design is based on the force-balance principle, thus using three simple geophone elements, the frequency bandwidth is extended from 90Hz, down to 0.1Hz. The default cable length between the sensor casing and the electronics box is approximately 20 meters but it can be extended up to150 meters.

The sensing elements are housed in the same 50mm casing, therefore a solid waterproof sensor is suitable for installation into boreholes where the noise is much less than the surface. The elements are oriented according to the 3-axes principle. A dot mark, incised on the plastic cover of the case that indicates the direction of the North direction. Surface mount sensor package is also available.

The sensor is totally controlled by an advanced signal conditioner circuit which supplies current to the geophones forcing them to a constant vibration at different frequencies. The signal conditioner circuit is fully protected against over voltage, opposite power supply polarity and lightning inductive currents. When inactive, it enters the “power-off” mode in order to reduce power consumption of the system.

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 micro-seismicity monitoring.

The design is based on the force-balance principle, Using three geophone elements, the bandwidth is extended to a lower frequency of the original geophone’s natural frequency. Actually three generations of the S-100 sensor have been implemented. Several low and upper corner frequencies provided through different senor configurations. Thus, 10s, 5s, 2s, and 1s low cut frequency corner is available as well as 50, 80 and 98 Hz high cut frequency corner. The sensitivity is 1000V/m/sec for the Mk1 version while it has been increased to 1500V/m/sec for the Mk2 and Mk3 versions.

The surface type has similar characteristics to the borehole type. No mass-lock or centering is required that makes easy the connection with the digitizer. The settling time of the unit is very short, only thirty seconds. Sensitivity is 1500V/m/sec (differentially) thus providing a very sensitive seismic unit. A test line is also provided for calibration and testing.

The C-100 is a three-component velocity equivalent output seismometer. The sensor consisted basically from three geophone elements, one per axis. When combined with our force-balance electronics (third generation), the bandwidth is extended to 10sec – 98Hz, and the sensitivity is increased to 1500V/m/sec.

The seismometer electronics are integrated to GEOThree digitizer and provide sensitivity 1500V/m/sec. The default cable length is approximately 20 meters but it can be extended up to150 meters. A dot sign, engraved on the plastic cover of the case, indicates the direction of each axis. A smart elastic clamping ensures excellent coupling with the borehole at any depth. Optionally, surface mount installation is available

This type of sensor has been designed for microseismic events recording during hydraulic fracturing reservoir experiments. The sensor body has been designed in order to house double geophone strings at each axis. The orientation follows the 3-axis principle. This sensor has an external diameter of 50mm allowing it to be installed into small and shallow boreholes, hence reducing the cost of installation. Using single geophone element per axis, the electronic noise floor becomes a limiting factor for this type of acquisition. Increasing the gain and minimizing the noise floor of the sensor give us the ability to record even smaller events.

This type of seismometer has been designed for microseismic events recording during hydraulic fracturing reservoir experiments. It uses quad geophone strings per axis, in order to maximize sensitivity and minimize noise level.  Ideally when paired with our GEOThree or GEOSix digitizer / recorder.