Why an Electronic Scale Can Measure Weight
An electronic scale looks direct: place an object on it and the display shows grams or kilograms.
The sensor does not directly see mass. It senses tiny deformation caused by force, then calibration converts that signal into a weight or mass reading.
The first model is: gravity creates load, load deforms an elastic element, strain gauges turn deformation into resistance change, a Wheatstone bridge converts that into tiny voltage, and calibration maps the voltage to weight.
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