GPR works by sending a radio signal or series of signals into the ground then collect and provide information regarding the ground characteristics by the returning signals. The main advantage of GPR in surveys is that it is an NDT method, i.e. neither invasive nor destructive.
GPR method has no limitations in detection materials and can generally detect both metallic and non-metallic materials
GPR has limited penetration in clay or saline environments
Advanced Electromagnetic Locator Survey method utilizes one out maximum of 4 modes or methods of operation; direct connection, clamp connection, identification by induction and passive sweep. These methods have been specifically developed for the identification and location of known and unknown utility services on a variety of different commonly encountered substrata.
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