Schmidt Hammer, Type NR

The H-2975NR Schmidt^® hammer, type NR, is designed for non-destructive testing of concrete items 4" (100mm) or more in thickness, or concrete with a maximum particle size less than or equal to 1.25" (32mm). It is designed for testing concrete within a compressive strength range of 1,450 to 10,152 psi (10 to 70 N/mm²) and impact energy of the test is 1.6 ft-lbs (2.207 Nm). The H-2975NR includes an integral paper strip recorder, which provides rebound values as a bar chart on a paper strip, providing a hard-copy record of the test data. One roll of paper can document 4,000 test impacts.