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The HM-320 Manual Universal Penetrometer is ruggedly constructed for accurate, sensitive measurements. The aluminum base has a machined, grooved table with leveling screws and rubber inserts to protect tips of needles and cones. Two stainless steel rods act as support guides for a cast aluminum head with coarse/fine adjustments and a calibrated friction-free plunger mechanism. Indicator dial has instant zero reset. Any needle or cone with standard 1/8in (3mm) diameter stem can be mounted to the 47.5g plunger assembly. A standard 2.5g ASTM D 5 Needle and two additional loading Weights (50g and 100g) are included.
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