Lignomat introduces the Ligno DuoTec B with the RH BluePeg for relative humidity analysis of concrete. This probe conforms to the ASTM F 2170 standard test method for determining the relative humidity in concrete floor slabs. The RH BluePeg can stay in the concrete until testing is done and can then be removed and reused for further tests, the company says. This meter also comes with a pinless method for scanning concrete and other building materials.