Johnson & Allen are a British manufacturer of Magnetic Particle Inspection (MPI) and Dye Penetrant Inspection (DPI) Equipment for Non-Destructive Testing (NDT). We design and manufacture standard and bespoke systems including dye penetrant lines, MPI bench units and power packs, handheld UV lights, magnetic yokes and an extensive range of magnetic particle and dye penetrant consumable products including; White contrast paints, magnetic inks, dye penetrants and developers.

We have been a market leader in the supply of crack detection equipment and consumables for over 80 years with a wealth of experience in both MPI and DPI systems.

Johnson & Allen’s quality system is registered by BSI (FM09387 applies)