April 16, 2026
OUR STORY & VISION
We envision a future where every electrical power system is safe, secure, and reliable. Our mission is to equip electrical power system operators with the means, knowledge, and insights to meet the increasing demands of this rapidly changing world. That’s why Doble is the world’s most trusted brand in electrical diagnostics. We provide energy system engineers with the tools, insights, and confidence to anticipate and overcome tomorrow’s power demands today.
About Us
Founded in 1920, Doble Engineering Company ensures reliable, safe and secure power for all. We do this by providing comprehensive diagnostics and engineering expertise for the energy industry.
Doble is part of the Utility Solutions Group of ESCO Technologies Inc. (NYSE: ESE) and serves customers around the globe. Doble is an ISO 9001 & ISO/IEC 17025 & 17034 certified company.
Our History
Experience NowAn Interactive Timeline of our First 100 Years
JOIN THE DOBLE TEAM
100 Years of Doble: Centennial Video
Watch our video to learn about Doble’s legacy and get a sneak peek of what the next 100 years may hold.
Doble Brands
CONDITION MONITORING & PARTIAL DISCHARGE SOLUTIONS
TECHIMP provides a full line of partial discharge, gas analysis, and thermal imaging monitoring solutions for a variety of electrical assets.
ABOUT TECHiMP
ADVANCED TESTING SOLUTIONS FOR ELECTRICAL ASSETS
Isa advanced testing equipment is designed to perform tests on protective relays, power transformers, instrument transformers, circuit breakers, batteries and many other high & medium voltage systems.
About ISA and TECHIMP
HIGH VOLTAGE - HIGH CURRENT HIGH POWER TEST SYSTEMS AND COMPONENTS
Phenix Technologies provides a complete line of high voltage, high power, and high current test systems and components.
About Phenix Technologies
SUBSTATION TEST EQUIPMENT
Rugged, reliable, accurate, and user friendly diagnostic test equipment that measures the health of critical substation equipment.
About Vanguard
ACCURACY BY DESIGN
Providing the most reliable & accurate online & portable DGA monitoring equipment, ISO-certified laboratory testing services, diagnostic software & the only commercially available gas-in-oil standards.
About Morgan Schaffer
