The IRS alcohol hydrometer is three-point certified to IRS standards for Proof and Tolerances and Traceable to NIST. It features 185 to 206% Proof range, I.R. size F, and is commonly used in distilleries that require certification. It also has a 0.2% subdivision and approximate length of 12.0079" (305 mm).

The IRS alcohol hydrometer is three-point certified to IRS standards for Proof and Tolerances and Traceable to NIST. It features 185 to 206% Proof range, I.R. size F, and is commonly used in distilleries that require certification. It also has a 0.2% subdivision and approximate length of 12.0079" (305 mm).