MGL gPhone X GRAVITY METER

 

The gPhone gravity meter is based upon the LaCoste and Romberg technology that has dominated land gravity meters since 1939.

The gPhone gravity meter has a low drift so that it can be used to integrate periodic signals (like earth tides) for very long time periods (years). The gPhone also has excellent height frequency response so they can be used to monitor higher frequency non-periodic events such as earthquakes.

The gPhone can be coarse-ranged over 7000 milliGals (worldwide, and has a 100 milliGal dynamic range during measurement. The versatile gPhone gravity meter has a sophisticated data acquisition system synchronized by a rubidium clock that can be locked to GPS so that arrays of gPhones can be used to give a wider area picture of seismic or long period gravity changes due to subsurface density changes. The instrument can be monitored and controlled via the internet for remote operation.

 

Applications include

Volcanic Monitoring
Earth Tides
Ground Water Monitoring
Earthquake Monitoring
Ocean Loading Studies

 

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Manufactured by Geotomographie GmbH

Technical Details

Generated wave types: SV
Signal frequencies: Up to 500 Hz (depending on geology and borehole distance)
Operational depth: Up to 100 m
Source length: 1015 mm
Source weight: 6 kg
Cable weight per metre: 377 g
Borehole diameter: 75-100 mm (or larger if spacers are used)
Clamping system: Infatable bladder
Depth indicator: Cable marking every 2 m
Connector: To impulse generator IPG800 or IPG5000
Storage: On drum
Switch box: Switch between two vertical shot directions

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