American-Made Alcohol Hydrometer Tester 0-200 Proof & Tralle Pro Series Traceable - Distilling Moonshine Alcoholmeter

Calibrated perfectly

Product arrived quickly and in secure packaging. Additional information is provided for use and care. There are also precautions mentioned in the instructions to prolong the life of this item. A link to an expanded temperature/proof chart is also included. Upon opening you will notice a nice presentation with a quality product to follow. I purchased the hydrometer jar as well, and plan to purchase more from this company as my hobby progresses. Well done.

I read several reviews on the calibration and I was somewhat skeptical, being that the hydrometer is a traceable product I decided to give this particular hydrometer a go. Upon receiving the hydrometer, I created a 3 point calibration bump test to verify that the hydrometer is indeed accurate and precise. The three point calibration curve was created with Sigma-Aldrich ethyl alcohol (200 proof) and Millipore HPLC water (<0.03ppb VOC) at the following proofs in a 250 mL graduated cylinder (+/- 1.5 mL tolerance) 180 proof, 120 proof, 80 proof. I mixed the calibration mixture with a magnetic stir bar on a stir plate for 5 minutes and allowed it to reach equilibrium in the lab for several hours. The temperature of the lab was 19.0 C. and the calibration mixtures were at 19.0 C as well. The hydrometer was placed in the graduated cylinders and allowed to reach equilibrium for several minutes prior to attaining measurements.After using the provided link on the temperature correction table provided with the hydrometer, I placed created a calibration curve and obtained the equation and R^2. The final results were in tolerance given the relative and absolute tolerance of the laboratory glassware I utilized and I obtained a R^2 value of 0.998. Which means the hydrometer you receive is in fact extremely accurate and precise for the amount of money you're spending on it.In short, I created a calibration curve with laboratory grade ethanol and ultra pure water. It checks out and its very accurate and precise. Make sure you allow the hydrometer and the solution you're placing it in reach equilibrium with the environment you're in and take note of the temperature in order to use the temperature correction table provided in hard copy or the more in depth on from the link provided in the handout in the mess of papers you get along with the hydrometer.

The product is exactly as advertised and excellent quality. I had a question and contacted the company and the owner replied to me personally within a short time! Im glad I paid a little more for the product because there really is no comparison between this and other ones Ive owned. Very pleased and highly recommended!

I have another just like it on hand. However, 2 is 1 and 1 is none. Just in case one of them breaks.