Recent Examples on the WebAt 6 or 7 p.m., Schmitz and his family will check the syrup with a spoon and with a hydrometer — an instrument for measuring sugar content, Schmitz said. Tyler Langan, Milwaukee Journal Sentinel, 11 Apr. 2018 That includes tools such as the hydrometer, containers to ferment and age, yeast, preservatives and, of course, the grapes. Carolyn Wilke, sacbee, 1 Aug. 2017 From scientific gadgets like the hydrometer, used to measure the density of sugar in liquids, to practical concerns like empty bottles, Maryland Homebrew is packed. Kit Waskom Pollard, Howard County Times, 3 May 2017