The IRS alcohol hydrometer uses the Proof scale and complies with IRS specifications. It features 60 to 80% Proof range, I.R. size I, 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 uses the Proof scale and complies with IRS specifications. It features 60 to 80% Proof range, I.R. size I, and is commonly used in distilleries that require certification. It also has a 0.2% subdivision and approximate length of 12.0079" (305 mm).
| Proof Range | 60 to 80% | 
| I.R. Size | I | 
| Subdivision | 0.2% | 
| Tolerance | ±0.3% | 
| Approx. Length | 12.0079" (305 mm) |