New subsurface radar RASCAN-4/2000 with frequency range of 1.5-2.0 GHz has been developed. Radar has the increased sounding depth. This modification has a handle that makes work easier while inspecting large areas.

Technical report about floor inspection in the Senate building, St. Petersburg, July 19, 2007 (PDF, 1.2 MB).

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Metal-plastic tube (sand, depth about 5 cm)
Plastic tube filled with water (sand, depth about 5 cm)