The use of strain gauge based load cells in a wide range of process applications has grown steadily in recent years. Indeed, non-contact load cells are rapidly becoming the preferred choice of sensor in many areas, including weight monitoring, batch control, mixing, dosing and blending of liquids or solids.
The quality, accuracy and stability of the load cell is, however, only part of the equation. Of perhaps equal significance is the design and installation of the loading assembly, which transfers the load from the vessel being monitored to the sensor itself. This is especially important with larger silos, hoppers and mixing vessels, where greater volume and weight have to be considered.
Although the fundamental strain gauge principle has remained largely unaltered since this type of product was first used for aircraft weight and balance measurement in the 1930's, the technology employed in the development and volume manufacture of load cells is now extremely advanced ....