Power Test, Inc.

Who We Are

Power Test, Inc. is an industry leader in the design, manufacture and sale of dynamometers, heavy equipment testing systems and related data acquisition and control systems. For over 40 years, Power Test has provided specialized test equipment to manufacturers, rebuild facilities and distributors in the mining, oil & gas, power generation, marine, trucking, construction, rail, and military markets in over 80 countries on six continents. Our headquarters and manufacturing operations are located in Sussex, WI with sales representatives worldwide.

How We Work

The Power Test team of innovative engineers, designers, software developers and sales consultants will SOLVE YOUR CHALLENGES with logical solutions. Our skilled machinists, fabricators, electronic technicians and assemblers build products to meet your unique needs. Our technical service experts are dedicated to working with you, anywhere and anytime. They travel the globe to ensure your equipment is running right and your staff is trained to operate it. Our exceptional product life and manufacturing expertise made us an industry-leading dynamometer manufacturer, as evidenced by our first machine sold, which is still in active use today!

We Make It Better

At Power Test, We Make It Better in all that we do. We make exceptional products and provide unsurpassed support. We offer valuable solutions to improve our customers’ businesses. We train, develop and enable our employees to make them the best they can be. We donate generously and work vigorously in the community around us to improve it in many ways, both large and small. We are committed to Making It Better for all.


In 1976, John Petelinsek set out to improve upon the traditional water brake dynamometer. The result was an affordable, durable dynamometer with increased absorption characteristics through a simpler, deeper pocket design.

Power Test, Inc. was founded, and John spent the next 25 years focused on building his company and providing the diesel engine market with a durable, reliable product and the best customer service in the dyno manufacturing industry.

Power Test has continued to build upon this solid foundation and has grown its product line through the design, manufacture, and development of a variety of engine and chassis dynamometers, engine and vehicle controls, and the latest technology in data acquisition systems.

In 2002, Power Test acquired Stuska Dynamometers, establishing itself in the performance engine testing market. With an existing customer base of nearly 3,000 and more than 40 years of proven performance, the Stuska product line was brought into the 21st century with the addition of Power Test’s manufacturing capabilities and its expertise in data acquisition and control systems.

In 2006, Power Test purchased the transmission and hydraulic testing equipment division of AIDCO International. AIDCO set the standard for hydraulic test equipment since its introduction to the market in the mid-1960s. The product line has been expanded and refined to become AIDCO Test Systems. Through the combination of a solid customer base and attention to the needs of an ever changing market, the AIDCO name was re-established as a leader in the transmission and hydraulic component testing industry.

In 2008, Power Test moved from Menomonee Falls to the current location in Sussex, WI. In 2012, the building was expanded to accommodate the increase in employees as the business continued to grow.

In 2012, the Custom Engineered Solutions division was established. This division works with customers around the world to design and manufacture machines for their unique testing needs. The CES division draws on the technical knowledge and skills within Power Test to craft solutions and manufacture one-of-a-kind testing equipment.

A strong commitment to the growth of the business and technical excellence has enabled Power Test to be a globally prominent, one-source provider for testing power train components and vehicles.

International Corporate Headquarters

Power Test, Inc.
N60 W22700 Silver Spring Drive
Sussex, WI 53089 USA

Phone: 262-252-4301
Fax: 262-246-0436

European Sales Office

Power Test Europe
Koningsspil 30
4661TW Halsteren
The Netherlands

Phone +31 65605 1795


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