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\%.
@article{arxiv.2306.08725,
title = {A magnetic falling-sphere viscometer},
author = {C. Patramanis-Thalassinakis and P. S. Karavelas and I. K. Kominis},
journal= {arXiv preprint arXiv:2306.08725},
year = {2023}
}