SENTINEL™ offers a large assortment of yoke kits, accessories, and magnetic particle materials. Magnetic particle inspection is a non-destructive testing method used for detection of surface and subsurface flaws in ferrous parts. Magnetic particle inspection is used to inspect a variety of product forms such as castings, forgings and weldments. We offer dry and wet particles as well as fluorescent or non-fluorescent particles for UV or daylight inspection.