Used by distillers, law enforcement, and taxing agencies to measure the alcohol content of beverages Calibrated on two scales: Tralle (0% by volume alcohol) and proof (2 x percentage of alcohol).
- Tralle scale, 0 to 100% graduated in 1% divisions
- Proof scale, 0 to 200 in two proof divisions
- Permanently marked with individual serial numbers
- Approximate liquid volume, 250mL