Consistent with B/T9138-1988 standards. This instrument applies to non-destructive testing the strength of sintered common brick is also suitable for lightweight aggregate concrete and other lightweight materials strength testing.
HT-75 belong to light energy test hammer, used to test 
compressive strength of light materials like brick, thin 
concrete and light board.
Specifications:
impact energy: 0.735J
impact stroke: 75mm
Size: L268mm*D54mm
weight: 1kg