The damping of linear oscillations of a thin plate suspended in a fluid from a helical spring is used as a means of measuring viscosity. Though originally designed for use with molten salts at high temperatures and pressures, the apparatus is not limited to such applications; in fact, it offers useful advantages for measurements at ambient pressure and temperature. Density measurements by the Archimedean buoyancy method may be made with the same apparatus by using an immersed body of relatively large volume in place of the plate, under nonoscillatory conditions. The design of the viscometer is presented in detail and its performance is discussed. An important advantage over torsional oscillation devices is the very simple relationship between viscosity and damping of the oscillations.
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White et al. (1969) studied this question.
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