Magnaflux 507923 Centrifuge Tube for MG-410 Fluorescent MPIMagnaflux 507923 Centrifuge Tube for MG 410 Fluorescent MPI Bath Monitoring The Magnaflux 507923 is a 100 ml ASTM pear shaped centrifuge tube used to monitor the bath concentration and contamination level of magnetic particles in Magnaglo MG 410 fluorescent magnetic particle baths. Graduated from 0 to 0. 2 ml in 0. 01 ml increments the finest graduation of any Magnaflux centrifuge tube the 507923 provides the precise readings needed to maintain