The Concrete Pocket Penetrometer is a rugged, lightweight unit using a calibrated reaction spring for resistance. Plated steel construction resists rust and stands up under harsh field conditions. 0 to 700psi scale is etched into barrel of piston. A snug-fitting indicator band slides on the piston to register maximum readings.
The Concrete Penetrometer allows estimates of when concrete mixes are approaching their initial set. Concrete that has reached initial set can no longer be effectively consolidated, and is nearly ready for final finishing operations. ASTM tests define the initial set of concrete mortar as when 500psi (3.4mPa) of force is required to embed a penetration probe to a depth of 1in. This penetrometer model is equipped with a 1/20in² (32.3mm²) penetration plunger, which is simply pushed into fresh concrete at a constant rate to the mark scribed at 1in (25mm). It can also be used in evaluations of mortars for unit masonry when equipped with the optional 2.7in (68.58mm) diameter Adaptor Foot.
Overall Dimensions: 7x0.75in (178x19mm), LxD.
Complies with ASTM C780