Schmidt Concrete Harmer Tester
1. Digital &
2. Manual Schmidt Hammer
A Schmidt hammer, also known as a Swiss hammer or a rebound hammer, is a device to measure the elastic properties or strength of concrete or rock, mainly surface hardness and penetration resistance.
Original Schmidt Concrete Test Hammer
Testing the compressive strength of a concrete cube using Schmidt hammer
It was invented by Ernst Schmidt, a Swiss engineer.
The hammer measures the rebound of a spring-loaded mass impacting against the surface of the sample. The test hammer will hit the concrete at a defined energy. Its rebound is dependent on the hardness of the concrete and is measured by the test equipment. By reference to the conversion chart, the rebound value can be used to determine the compressive strength. When conducting the test the hammer should be held at right angles to the surface which in turn should be flat and smooth. The rebound reading will be affected by the orientation of the hammer, when used in a