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What is American Petroleum Institute scale on hydrometers?

In: Units of Measure, Oil and Petroleum [Edit categories]

Answer:

The American Petroleum Institute (API) scale on hydrometers is an arbitrary scale based on Relative Density (Specific Gravity) where -

API = (141.5 divided by the Relative Density at 60^oF) - 131.5

First answer by Stevenson Reeves Ltd. Last edit by Stevenson Reeves Ltd. Contributor trust: 3 [recommend contributor ]. Question popularity: 3 [recommend question].

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