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HM-571 Manual Mortar Penetrometer determines initial and final set of hydraulic cement mortars that have been sieved from concrete mixtures. The Penetrometer consists of a spring dynamometer with a graduated scale on the stem of the handle graduated from 10—130lbf (45—580N) in increments of 2lbf (9N), and is operated with a downward force to penetrate 1in (25mm) into a sample. Resistance is indicated by a sliding ring indicator on the stem. Unit comes with convenient carrying case and includes six stainless steel penetration needles with 1, 1/2, 1/4, 1/10, 1/20, 1/40 in² (645, 323, 161, 65, 32, and 16mm²) bearing areas.
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