BoltSafe donut load cells are specifically designed for measuring and monitoring bolt load in bolted constructions, both during assembly and over time. Knowing the bolt load enhances safety, makes joints more dependable and improves the control over the construction. Place a BoltSafe donut load cell on the non-driven side of a bolted connection, preferably under a nut. The forces that are applied to the bolt when the bolt is being tightened, will result in minor deformations of the stainless steel washer. These deformations cause changes in the electrical resistance, which are then constantly measured. This is the data we use to determine the bolt load very precisely at any moment.
BoltSafe donut load cells are not only capable of measuring bolt load, but also other load, weight and forces. Examples of applications are Structural Health Monitoring and in temporary constructions, where the load cells are used to make sure that the construction doesn’t collapse. Our donut load sensors are available in two versions, the CMS sensor for continuous monitoring and the PMS sensor for periodic monitoring. Both are available in a standard stainless steel version and a stronger version that can withstand 15% more load while keeping the same compact dimensions.