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Gauge factor is defined as the ratio of fractional change in electrical resistance to the fractional change in length (strain):. The Gauge Factor for metallic strain gauges and measurement.pdf. A strain gauge is a device used to measure the strain on a free surface of a structure. Strain gages are the measurement, the strain gage and adhesive should be compatible with the measuring material and operating conditions such as temperature, etc. In our strain gauge PDF catalogue you will find all strain gauges for the experimental stress analysis, as well as accessory products at a glance. Strain gages are the most common sensing element to measure surface strain. Let's briefly learn about stress and strain and strain gages. The HBM strain gauge range consists of the Y, C, M, G series and special strain gauges. There are different type series within each strain gauge series. Many Strain gages are small and light, operate over a wide temperature range, and can respond to both static and dynamic strains. They have wide application and