PCE Instruments PCE-HT-225A Hardness tester

The hardness testing device PCE-HT-225A (Schmidt hammer) is a compact, mechanical testing instrument used to determine the compressive strength of concrete. It operates based on the measurement principle of Schmidt and is primarily utilized in the construction and building sector. Additionally, this easy-to-use concrete testing hammer is also employed in various other industries, such as for testing the hardness of products on rolls.

The testing is conducted with a constant test energy of 2.207 J. The initial kinetic rebound energy is indicated as a measure of concrete hardness, surface pressure, or compressive strength (kg/cm² or converted to N/mm²) on the hardness testing device. The quality of concrete is mainly assessed based on its compressive strength, as this is crucial for the load-bearing behavior and durability of concrete structures.

The compressive strength is designated by a combination of letters and numbers. For example, B 25 indicates that it is normal concrete with a compressive strength of 25 N/mm². There are various intermediate values up to the highest strength class B 55. With the hardness testing device, you can easily, quickly, and accurately classify concrete. The concrete testing device is always delivered factory-calibrated upon order but can also be optionally laboratory-calibrated and equipped with an ISO testing certificate.