What would happen to the accuracy of a float gauge if the fluid it is

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SUMMARY

The accuracy of a float gauge is significantly affected when the fluid it measures is heated. As the fluid expands, its density decreases, causing the liquid level to rise. This rise in level is inversely proportional to the density change, resulting in the float sinking deeper but not sufficiently to offset the increased liquid level. Additionally, the change in level reading is influenced by the container's profile and the float's design.

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What would happen to the accuracy of a float gauge if the fluid it is measuring is heated?
 
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As the liquid expands and reduces it's density;
1. The level of the surface will rise significantly, inversely proportional to density.
2. The float will sink slightly deeper, but nowhere near enough to compensate for 1.

In addition to the temperature induced density change, the change in level reading will be dependent on the profile of the container and of the float.
 

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