Concrete Moisture Meter and Hygrometer Test Kit by Tramex Moisture/RH meter enables you to carry out 4 individual tests: Measure non-destructively and instantly the moisture content in concrete and gypsum flooring Measure within the floor slab or screed using the (below surface) In-situ method Measure above the surface of the floor slab or screed using RH hood test methods Measure the relative humidity, temperature and dew point of the floor being installed