Now in 110 countries, Doble Engineering Company has been helping clients in the electric power industry improve operations and optimize system performance for nearly a century.

Doble offers diagnostic instruments, services, and the world’s premier library of statistically significant apparatus test results for the benefit of energy generation and delivery companies and industrial power users worldwide.

Since it was founded in Boston, Massachusetts in 1920, Doble Engineering Company has served the electric power industry by providing diagnostic instruments, services and, above all, knowledge. The company maintains the Doble Knowledgebase – the epicenter of industry research and the world’s most extensive resource library of apparatus test results and knowledge.

With numerous offices across the United States, Doble’s worldwide headquarters is in Watertown, Massachusetts.