Hydrometer

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HYDROMETER. An instrument for measuring the density of fluids; being immersed in fluids, as in water, brine, beer, brandy, &c., it determines the proportion of their densities, or their specific gravities, and thence their qualities.
     2. By, the Act of Congress of January 12, 1825, 3 Story's' Laws U. S. 1976, the secretary of the treasury is authorized, under the direction of the president of the United States, to adopt and substitute such hydrometer as he may deem best calculated to promote the public interest, in lieu of that now prescribed by law, for the purpose of ascertaining the proof of liquors; and that after such adoption and substitution, the duties imposed by law upon distilled spirits shall be levied, collected and paid, according to the proof ascertained by any hydrometer so substituted and adopted.

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Petras, president Instrumentation: Curemeters/rheometers, densimeters, physical testing equipment, flexing machines, processability testers, specific gravity testers, tensile tear testers, tensile strength testers, viscometers
Instrumentation: Calenders, curemeters/ rheometers, densimeters, extruders, laboratory equipment (miscellaneous), mills, mixers, physical testing equipment, presses, software systems, abrasion testers, compression testers, cord tensile testers, creep rupture testers, density testers, fatigue testers, flexing machines, flow index testers, plasticity testers, processability testers, shear testers, specific gravity testers, tack testers, tear tensile testers, tensile strength testers, viscometers
Instrumentation: Testing technologies for rubber, including durometers/IRHD hardness testers, flexometers, testers for abrasion, rebound resilience, tensile, brittleness, densimeters, dies and clicker presses and more (See ad on page 7)
Instrumentation: Hardness testers H14 (IRHD), H17A (Shore A); H17D (Shore D); micro hardness testers H12 (IRHD), H17M (Shore); high precision densimeter X22B; rapid plastimeter P14; compression stress relaxometer C11 ; aging chambers O7E and O14; DeMattia flex testing machine F15/16; Mooney viscometer V3; thickness gauges; testers for abrasion, compression set, low temperature; plasticity and resilience; specimen preparation equipment
Apparent density measurements with an electronic densimeter (TMI Testing) were conducted on all collected samples to determine their gas fraction.
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The density of the solidified compact was measured with a MD-200S electronic densimeter, which employs the Archimedes principle, and results were reported in terms of relative density of the polymer, which is defined as the ratio of the density of a sample at time t divided by the theoretical density of the pure polymer.
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