DEVICE FOR MEASURING MAGNETIC PARTICLES IN A LIQUID

摘要

A method and device for measuring the amount of magnetic particles in a liquid wherein a known amount of liquid is contacted with a bed (12) of ferromagnetic fibers maintained in the magnetic field of a magnet (14) with sufficient strength to substantially completely magnetize said particles for a time long enough for said particles to migrate to and be substantially completely captured by said fibers and having a magnetic flux sensor (15) positioned between a pole face (N) of said magnet (14) and said bed (12) wherein the distance from said sensor (15) to the fibers farthest from said sensor is not greater than about 6 millimeters.