- Lightweight, spring-reaction type concrete penetrometer with dial gauge for field and lab evaluation of the initial set of concrete mortar, based on ASTM C403.
- Penetration plunger has a 1/20 sq. in. tip area. Plunger is steadily pushed into the mortar to a 1 in. depth, as indicated on the shaft, at periodic time intervals.
- Penetrometer's calibrated range is 0-700 psi.
- Resistance in psi is indicated on the scale.
- The term "initial set" is the semi-hardened, partially hydrated condition of the concrete beyond which it can no longer be worked.
- The point of initial set is reached when the penetration value is 500psi.
- Complies with ASTM C780.
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