The IRS alcohol hydrometer is three-point certified to IRS standards for Proof and Tolerances and Traceable to NIST. It features 80 to 120% Proof range, I.R. size B, and is commonly used in distilleries that require certification. It also has a 0.5% subdivision and approximate length of 9.05512" (230 mm).

The IRS alcohol hydrometer is three-point certified to IRS standards for Proof and Tolerances and Traceable to NIST. It features 80 to 120% Proof range, I.R. size B, and is commonly used in distilleries that require certification. It also has a 0.5% subdivision and approximate length of 9.05512" (230 mm).