Surface tension

Density measurement

Apart from the measurement of interfacial and surface tension, the K11, EasyDyne and K00 also provide an accurate method for determining the density of liquids.

The measurement makes use of the fact that as a result of the buoyancy of a solid in a liquid the measured weight in a liquid is less than that measured in air. The mass of the volume of liquid displaced by the measuring probe corresponds exactly to the difference in weight. If the density of the measuring probe is known then the density of the liquid can be obtained by differential weighing.

The equation for the calculation is:

\rho_L = \rho_{MK}     \frac {\cdot G_{MKA} - G_{MKL}}{G_{MKA}}

( \rho_L = density of liquid; \rho_{MK} = density of measuring probe; G_{MKA} = weight of measuring probe in air; G_{MKL} = weight of the measuring probe in the liquid)