Load cell is an electronic device (transducer) that is used to force into an electric signal. This conversion is indirect and takes place in two phases. Through a mechanical system, the power to hear a deformed DMS. The strain gauge converts the deformation (strain) into electrical signals. A load cell usually consists of four strain gauges in a Wheatstone bridge configuration. The load cells for one or two gauges are also available. The electrical signal is usually the order of a few millivolts and requires amplification by an instrumentation amplifier before it can be used. The output of the converter is an algorithm to calculate the force acting on the processor.
Although DMS load cells are the most common, there are also other types of load cells as well. In industrial applications, hydraulic (or hydrostatic) is probably the second most common, and these are used for some problems with the load cell strain gauge devices. For example, a hydraulic load cell is immune to the transient voltage (lightning), can be an effective device in the open.
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