Hydrometer Instructions

People have asked if I would provide some simple instructions on how I measure the Sugar content in Rum. Below are listed the few simple steps needed to make an estimated calculation.

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Authentic Caribbean Rum

On the 27th August 2014, I took the early flight to London so I could attend the ACR Training session. ACR (Authentic Caribbean Rum) is a marque under which members of WIRSPA (West Indies Rum & Spirit Producers  Association) can certify their products. But more about that later. The session took place at WSET (Wine & Spirit Education Trust) in London and this particular session was done by ACR Panel member Amit Sood. The session was the last one scheduled to take place in London and turned out to be extremly popular. More than 50 had signed up, but only around half of that managed to get a seat. Amit ensured that those who came in vain, would be guaranteed a seat for an additional Training session to be scheduled soon in London.

From Denmark we where 3 guys who went for the training session, Copenhagen Rum Club owner Daniel and his Head bartender Niels took the trip to London with me. As the agenda below will reveal, there was some info about the ACR Marque and WIRSPA in general, but this turned out to primarily be a tasting session of 18 rum expressions.

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List of rum measured

This is a list of all the rum's that has been measured so far.

The method used: The Hydrometer method

The reason for doing these measurements: No additives


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The Hydrometer method

I've received a few questions about the method I use to determine the sugar content in Rum (what we assume to be sugar), so I thought that I would write a detailed description on the method and also give some background info.

The Hydrometer.
When measuring the Alcohol content in a Liquid (in this case Rum), there are a few ways to do it. The most simple way is to use a Hydrometer which has a scale showing the alcohol by volume in % (also called %ABV). This type of Hydrometer is also refferred to as an Alcoholmeter. A Hydrometer works according to Archimedes law, which states:

Any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.

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