Information on Ethanol Gauging and Blending Methods

This section lists some articles which give background information on the methods used for ethanol gauging and blending.

Click on the links below to read the articles.

  1. Theory for Hydrometer Temperature Correction
    This article describes the theory that makes it possible to use an ethanol hydrometer at temperatures other than the calibration temperature. This theory is used in the hydrometer temperature correction calculator built into AlcoDens.

  2. Alcohol Dilution Calculation Methods Compared
    This article compares 3 methods for calculating alcohol dilution ratios. The advantages and shortcomings of each method are discussed and examples are given. The 3 methods covered are the AlcoDens Blending Calculator, The TTB Table No.6 Method and the Pearson's Square Method.

  3. Canadian Alcoholometric Table Anomalies
    While it is well known that mass and density values in the US TTB tables are based on an "in air" assumption and those in the OIML tables are based on "in vacuum" it is less well known that the Canadian tables are a hybrid of these two methods. The Canadian tables also do not make it very clear that the listed densities are apparent densities and not true densities. Since the Canadian tables do not include methods for performing blending calculations and it is necessary to interface the values obtained from these tables with other procedures it is important to have an understanding of the exact meanings of the values in the tables.

    A proper understanding of the situation is developed in this article by comparing the examples in the Canadian tables with the same calculations performed in AlcoDens.