C. Patramanis-Thalassinakis

A magnetic falling-sphere viscometer

We present a falling-sphere viscometer with a magnetized sphere and fluxgate magnetometers continuously measuring the magnetic field produced at the sensor positions by the falling sphere. With a fluid volume of 15 ml and within a few seconds, we directly measure dynamical viscosities in a range between 200 cP and 3000 cP with a precision of 3\%.