Johnson & Allen Ltd - MPI and DPI Equipment For NDT
Johnson & Allen Ltd - MPI and DPI Equipment For NDT Johnson & Allen are a British manufacturer of MPI and DPI Equipment for NDT. We have designed and manufactured standard and bespoke systems for over 80 years. Johnson & Allen are a British manufacturer of MPI and DPI Equipment for NDT. We have designed and manufactured standard and bespoke systems for over 75 years.