Many road construction companies calculate and charge their cost based on the thickness of the asphalt layer; this procedure of cost calculation was introduced in Germany more than 30 years ago and is recognized by most national road construction authorities in a national standard since 1989.
Measuring the thickness of a road layer using the old-fashioned core drill method is a destructive, time-consuming, costly and inaccurate procedure. ElektroPhysiks StratoTest gauge has none of these drawbacks, combining completely non-destructive measurement with accurate and repeatable test results displayed within seconds.
The StratoTest works according to the same principle as a metal detectors. While metal detectors only detect the presence of metal, the StratoTest gauge can also measure the exact distance to the metal surface.