The HT225D Digital Concrete Test Hammer is an integrated rebound hammer that combines a data processor and a test hammer in a single unit for the non-destructive testing of concrete and building materials, whether in a finished structure or in prefabricated blocks. The HT225D Digital Concrete Test Hammer gives engineers and quality-control teams a fast estimate of concrete quality without coring or otherwise damaging the element under test.

The HT225D Digital Concrete Test Hammer strikes the surface and measures the rebound; from the rebound value it calculates the compressive strength of the concrete automatically and corrects for the direction of impact. Results appear on a high-contrast OLED display, which shows both an analogue ruler and the digital value. The measuring range of the HT225D Digital Concrete Test Hammer is 10 to 70 N/mm2 with an accuracy of plus or minus 0.1R, and impact energy is 0.225 kgm (2.207 Nm), suited to testing ordinary building and bridge construction. All setups can be made on site.

Up to 4,000 readings can be stored, organised as 1000 parts with 256 data points each, and transferred to a PC over USB 2.0 or, optionally, via Bluetooth. The HT225D Digital Concrete Test Hammer runs from a 3.7 V Li-ion rechargeable battery charged through the USB port, weighs 1.1 kg and operates from -40 to 60 degrees C.

The HT225D Digital Concrete Test Hammer can be used in accordance with ISO 8045, BS 1881 part 202, ASTM C805, DIN 1048, EN 12504-2, NF P18-417, UNE 83307 and UN9189. It is supplied by BAMR, South Africa's authorised distributor.