Geophysical Instruments
exploration, near surface and marine instruments
 
           
          Ground Penetrating Radar
Ground-penetrating radar (GPR) is a geophysical method that uses radar 
            pulses to image the subsurface. This nondestructive method uses electromagnetic 
            radiation in the microwave band (UHF/VHF frequencies) of the radio 
            spectrum, and detects the reflected signals from subsurface structures. 
            GPR works by sending a tiny pulse of energy into a material and recording 
            the strength and the time required for the return of any reflected 
            signal.
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          Seismograph
Seismic Instruments examines a wide diversity of geophysical instruments: seismometers, 
            computerized digital seismic stations, ocean bottom and borehole seismic 
            stations, automation of geophysical monitoring, strainmeters and tiltmeters. 
            Marine and Land seismographs. Multi-channel seismograph for LVL and 
            engineering seismic applications. Exploration seismograph SUMMIT X 
            Stream Pro Value quality seismograph for engineering application. 
            A seismometer is an instrument that measures motion of the ground, 
            caused by, for example, an earthquake, a volcanic eruption, or the 
            use of explosives.Exploration seismograph SUMMIT II Ex Intrinsically 
            safe seismograph for use in underground mining. The traditional compact 
            24-channels ...A seismograph is a device used for recording earth 
            tremors. Basically, it is a heavily weighted horizontal rod (pendulum) 
            suspended from a pole.
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          Geoelectrical Instruments ERT
Geoelectrical methods are used for mapping the depth of soils and rock. It involves 
            placing stakes in the ground and measuring electrical resistance. 
            extensively in groundwater mapping for investigation of the vulnerability 
            of aquifers and shallow aquifers themselves.
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Electromagnetic Induction - EM
EM devices can simultaneously examine soil conditions and locate objects found 
            beneath the surface of the earth spatially, but do not provide good 
            depth information.
            
Read about Electromagnetic 
            Instruments