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Q:

How does temperature affect the accuracy of a pressure gauge?

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Temperature changes affect the stiffness of a bourdon tube. The stiffness change is produced by a combination of changes in the elastic (Young’s) modulus and a change in linear dimensions due to linear expansion and contraction. The error caused by temperature change will follow the approximate formula: ± 0.04 x (t2 – t) % of the span. more
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