Delivered to More Aggregate, Mining & Mineral Processing Professionals Worldwide than any other E-Publication

Vulcan On-Board Scales provides on-board weighing systems for all types of trucks and trailers with spring, air, or mixed suspensions including systems for dump trucks, concrete mixers, and other aggregate applications.

Vulcan On-Board Scales are manufactured by Stress-Tek, Inc. which was founded in 1978 near Seattle, Washington. Stress-Tek initially provided professional consulting services in the fields of transducer design and experimental stress analysis. But based on customer needs operations quickly expanded to include the design and manufacture of state-of-the-art on-board weighing systems for the transportation industry. This evolution resulted in a stand-alone Vulcan On-Board Scale business founded in 1984. Today Vulcan On-Board Scales is our primary business, providing on-board weighing solutions to the trucking industry. In addition, we continue to provide custom solutions for the aerospace, marine, medical, heavy machinery, process control and other industrial markets

Originally Vulcan On-Board Scales were developed in response to the needs of the logging industry for a better on-board weighing system. The Vulcan double shear beam (DSB) load cell was designed to meet the harsh demands of the logging industry. This design received several patents and set new standards for accuracy, reliability and durability. Vulcan next introduced the first two-wire, digital electronics weighing system for on-board applications. This new, innovative design virtually eliminated the cable and moisture problems in the truck/trailer applications that caused traditional electronic systems to fail.

Vulcan continues to set accuracy and dependability standards through an uncompromising commitment to quality and continuous production introductions and improvements, such as the Vulcan Super-Beam™ shear beam load cells, and VSL communications systems. These ongoing developments have resulted in on-board weighing solutions for vehicles in the aggregate, mining, timber, refuse, general trucking and agriculture markets.

Today, Vulcan On-Board Scales is recognized as a world leader, with systems installed on over 30,000 vehicles worldwide. Customers appreciate our continued focus on superior design, manufacturing quality, and customer support.

For more information visit or call 1-800-237-0022.