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Micro-Measurements Strain Gages Grid Resistance Micro-Measurements strain gages are available in various resistance values that range from 30 to 5000 ohms. Strain gages with resistances of 120 and 350 ohms are commonly used in experimental stress analysis testing. For the majority of applications, 120-ohm gages are suitable; 350-ohm gages would be preferred to reduce heat generation, to decrease leadwire effects, or to improve signal-to-noise ratio at the same power level. Higher resistances are typically used in transducer applications and on composite materials.