Measurements International (MI), in keeping with “Metrology is our Science, Accuracy is our Business™, has introduced the first commercially available Automated Dual Source High Resistance Bridge (model 6600A), The Dual Source High Resistance Bridge principle has become the primary measurement technique of all National Measurement Laboratories (NMIs) around the world due to its unprecedented level of accuracy and stability over various other methods. Multimodal operation in the 6600A allows users to make resistance measurements in different ways.