By the mid-1920's, the product evolved into the "Drive-On Loadometer," a significant improvement in which the scale was placed on the ground and vehicles were able to "drive-on." In the late 1920's, a "Turtleback" design was engineered that offered the benefit of increased load capacity to 20,000 lbs.
In 1939, Black and Decker introduced the Type A Loadometer. This mechanical version stayed in production through the mid-1980's and thousands of these scales remain in use around the world today. Black & Decker sold Loadometer to the Industrial Sales Company of Baltimore in 1954, which formed Loadometer Corporation. They continued to produce and distribute the Loadometer scale and eventually sold the company in 1979.
Haenni still leads the industry with the model WL101, the only low profile, hydraulic/analog scale in production. The WL101 offers the benefits of low height, light weight, large active platform areas and reliable performance.
These industry-leading scales are available exclusively in the U.S. from Loadometer Corporation.