Used check that the concentration of magnetic particles in your test liquid solution is at the correct level.
ASTM MPI Concentration Measuring Tube
The ASTM centrifuge is a glass vessel designed in accordance with the ASTM standards. It has a capacity of 100 ml, with calibrated marks on the outside, and is used to accurately measure the concentration of magnetic particles (solid content) present in magnetic inks.
To be used as part of a MPI system’s regular performance check – Necessitated by many common MPI standards.
Fluorescent Ink Flask – 0.05ml graduations for use with fluorescent magnetic inks.
Black Ink Flask – 0.10ml graduations for use with black magnetic inks.