The Schmidt rebound hammer is principally a surface hardness tester. The Original Schmidt is available in models with different
impact energies, each test hammer designed for a specific test application.
The Romans were aware of the fact that good mortar (opus caementicium) is hard and of a high compressive strength. They tested
its quality subjectively by scratching the surface with an iron nail.
But only in the mid-20th century was this know-how utilized. A device was invented which made non-destructive compressive
strength testing feasible.
FEATURES:
Portable and flexible
Simple and convenient to use
Impact energy: 0.735 Nm
Measuring Range: 10-70 N/mm2
Conforms to BS-1881-202, ISO/DIS 8045, ASTM C-805
Unit Selection: MPa, Psi
Travel carry case
Originally Found Here : http://www.reboundhammer.com/schmidt-rebound-hammer.html#sch
impact energies, each test hammer designed for a specific test application.
The Romans were aware of the fact that good mortar (opus caementicium) is hard and of a high compressive strength. They tested
its quality subjectively by scratching the surface with an iron nail.
But only in the mid-20th century was this know-how utilized. A device was invented which made non-destructive compressive
strength testing feasible.
FEATURES:
Portable and flexible
Simple and convenient to use
Impact energy: 0.735 Nm
Measuring Range: 10-70 N/mm2
Conforms to BS-1881-202, ISO/DIS 8045, ASTM C-805
Unit Selection: MPa, Psi
Travel carry case
Originally Found Here : http://www.reboundhammer.com/schmidt-rebound-hammer.html#sch