Measuring range 10 to 70 N/mm2 compressive strength.
Handling and dimensions as for types N and Nr, but with a three times smaller impact energy.
These types are used for testing thin walled (< 100 mm) or small components but also cast stone components sensitive to impact.

Supplied in a carrying case including a grinding stone and operating instructions.
Case Dimensions: 325 x 125 x 140mm
Weight: 1.4kg

Test Procedure

(Similar for all types)
Smooth test area with a grinding stone.
Perform test series of at least ten test impacts.
The compressive strength of the concrete is read from a conversion chart.