Integrity Design & Research Since 1987 we have been providing high quality ELF instrumentations for AC and DC magnetic field measurements. Customers include Federal Government Agencies such as, NASA, the FDA, Los Alamos Nat'l Laboratory and the US NAVY, as well as various States and local government agencies. Universities, Electric Power companies, Researchers, Industries, Hospitals and Consumers, interested in ELF & static magnetic field measurements also utilize our products. Integrity Design can be contracted to design custom electronic/electrical instruments. Just talk to our engineer staff about your project. Thank you again for asking ...about our products, our commitment is to provide excellent value and full service for your investment. We promise to live up to our name by offering that "extra" ingredient every day to make sure you are happy. Ask our customers about us, they can attest to our reputation. Integrity instruments are unique to the industry and they are used in various parts of North America, Europe, Australia and Asia.