One of the best choices for heavy use in the Brewery, lab, or classroom where breakage is common. Made to specifications of laboratory grade 3.3 Borosilicate glass for testing higher proof products, this cylinder measures 12" tall x 1.75". And this combo includes a high quality glass proof and tralle hydrometer. The 3" diameter base has 3 contact points to resist tipping. Because this specialized cylinder is intended for quick and clear hydrometer readings there are graduations to insure your getting an accurate reading, and the narrow 1.5" diameter bore means you can take an accurate reading with less product than a normal graduated cylinder. Comes with pour spout and heavy fire-polished rim to resist chipping. Made of 3.3 Borosilicate glass, graduations at 20ml intervals. Heavy round base measures 3.25 in. diameter, 12 in. tall, 1.75 in. diameter cylinder

12" Glass Test Jar:
Made of heavy wall 3.3 Borosilicate glass, weighs 8.9 oz. 250ml capacity, graduations at 20 ml intervals
Heavy round base measures 3.25 in. diameter, overall 12 in. tall, cylinder is 1.75 in. diameter
The 3" diameter base has 3 contact points to resist tipping
Accuracy is +/- 20ml

Proof & Tralle Hydrometer For Distilled Alcohol and Spirits

A Proof and Tralle hydrometer directly measures the alcohol content of distilled alcohol or spirits with a specific gravity less than 1.000. It is unlike standard beer and wine hydrometers because it is calibrated to give a direct reading of actual alcohol content and not the density of the liquid. This hydrometer provides 2 scales of measurement which are Proof (the US International Revenue Scale for proof of spirits) and Tralle (the actual percentage of alcohol). It is calibrated to give accurate readings at 60F (15.6C) and includes a chart that provides the adjustments needed when using it at different temperatures.

To use the hydrometer, simply fill a test tube with the liquid sample. The plastic storage container that the hydrometer is supplied with can also be used as the testing container however a test tube with a wide base provides additional benefits. The volume of the liquid must be large enough to completely suspend the hydrometer. Place the hydrometer in the liquid, make sure that it is completely suspended and that there are no air bubbles or other obstructions. The result is determined on the hydrometer scale at the surface of the liquid.

Notes:

A Proof and Tralle Hydrometer is meant to provide a general indication of alcohol content. A very precise measurement requires the use of more specialized equipment.
A Proof and Tralle Hydrometer is designed to only test 'pure' distilled spirits such as whiskey and vodka. It is not meant to be used with liquors that have high concentrations of sugar or other ingredients such as Rum, Kahlua, Jagermeister, cordials and liqueurs.

Specifications:
Proof Scale: 0 - 200, (2 Point Resolution)
Tralle Scale: 0 - 100% (1% Resolution)
Temperature Calibration: 60F (15.6C)
Dimensions:
Length: 11.5in (29.2cm)
Width (at widest point): 0.71in (18mm)

Width (at narrowest point): 0.35in (9mm)