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The electrical resistance of a strain gage is directly related to its sensitivity. For a given wire gage of a material, the higher the resistance, the higher the sensitivity.
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Select a higher resistance gage, e.g., 350 or 1000 W, if |
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Higher sensitivity is desired. |
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Compatibility with existing instrumentation is desired. |
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Select a lower resistance gage, e.g., 120 W, if |
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Fatigue loading is an issue (Lower resistance wire is larger in diameter, and more fatigue resistant). |
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Cost is an issue. 120 W gages are usually less expensive than 350 W gages. |
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