© 2013 Proceq SA
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2. Instrument Selection
2.1 Schmidt OS-120 models
There are two models available.
•
OS-120PT for testing concrete in the very low compressive strength range. Typically from 1 N/
mm2 to 5.0 N/mm2 ( 145 psi – 725 psi). This makes the instrument very suitable for testing fresh
concrete to determine the time for formwork removal.
•
OS-120PM for testing the mortar joints in brick constructions.
3. Schmidt OS-120 Layout
1 Housing with handle
2 Reset lever
3 Hammer complete (PM/PT)
4 Trigger button
5 Scale (Rebound value)
6 Control knob
7 Hammer head (PM/PT)
A Contact surface
B Loading position
Hammer head Schmidt OS-120PT (7)
Hammer head Schmidt OS-120PM (7)
