How a Strain Gage Load Cell Works?

Load cells are mechanical components which act as force sensors by employing strain gages to provide an electrical output proportional to the applied force. Typically the electrical output is either analog (voltage or current) or digital. Load cells have specific mechanical packaging and sensing orientation to fit into electronic scales, and testing and monitoring systems. Load cells can be used for tension, compression, and/or shear measurement. Tension load cells are used for measuring forces that are in-line and "pull apart". Compression load cells are used to measure forces that are in-line and "push together". Shear load cells are used to measure tension or compression forces that are offset (not in-line). When selecting load cells, there are many form factors or packages to choose from to insure their physical size is compatible with space available for the application, such as inside an electronic weighing scale.
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