An apparatus utilizing a photocell detection system was designed and built to measure the force required to crush a spherical particle 0.05 to 0.5 mm in diameter. The force applied to the particle causes a variation in light area on two matched photocells. The signal from the unbalance in the photocells is recorded without amplification on a millivolt recorder as the particle is crushed. Standardization is accomplished by placing known weights on the apparatus and measuring the displacement on a recorder. The apparatus can be used to measure crush strengths from 0.080 to 2500 g.
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Research Article| December 29 2004
Crush Strength Apparatus with a Photocell Detection Unit
W. R. Amos;
E. T. Burgess;
W. R. Amos, E. T. Burgess, E. A. Mershad; Crush Strength Apparatus with a Photocell Detection Unit. Rev. Sci. Instrum. 1 July 1967; 38 (7): 910–912. https://doi.org/10.1063/1.1720920
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