Electromagnetic detection methods use a known frequency that is induced onto a metallic service. This can be located from above the ground along with the depth of the service.
Where inspection chambers need to be accessed, probes can be inserted into ducting and drainage pipes in order to provide the most concise picture of what is under the ground.
Many Authorities are replacing metal pipework with newer plastic infrastructures. Due to the increased presence of plastic and fibre optic, there is a growing need for radar along with electromagnetic detection.
Radar provides a picture of everything under the ground. The interpretation of this data by our experienced surveyors is how we complete the picture and provide the most comprehensive utility survey.