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The depth is read off the scale A. A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy. They are typically calibrated and graduated with one or more scales such as specific gravity . A hydrometer usually consists of a sealed hollow glass tube with a wider bottom ...
The Fahrenheit hydrometer is a constant-volume device that will float in water. In the figure shown here, the hydrometer is floating vertically in a cylinder containing a liquid. At the bottom of the hydrometer is a weighted bulb and at the top is a pan for small weights. To use the hydrometer, one first accurately determines its weight (W ...
Daniel Gabriel Fahrenheit FRS ( / ˈfærənhaɪt /; German: [ˈfaːʁn̩haɪt]; 24 May 1686 – 16 September 1736) [1] was a physicist, inventor, and scientific instrument maker, born in Poland to a family of German extraction. Fahrenheit invented thermometers accurate and consistent enough to allow the comparison of temperature measurements ...
v. t. e. A hygrometer is an instrument which measures the humidity of air or some other gas: that is, how much water vapor it contains. [1] Humidity measurement instruments usually rely on measurements of some other quantities such as temperature, pressure, mass and mechanical or electrical changes in a substance as moisture is absorbed.
The first International Maritime Conference held at Brussels in 1853 (aka "Brussels Conference") for devising a uniform system of meteorological observations at sea [1] recommended the systematic use of the hydrometer. Captain John Rodgers, Lieutenant Porter, and Dr. William Samuel Waithman Ruschenberger, all of the United States Navy did this ...
Baumé scale. The Baumé scale is a pair of hydrometer scales developed by French pharmacist Antoine Baumé in 1768 to measure density of various liquids. The unit of the Baumé scale has been notated variously as degrees Baumé, B°, Bé° and simply Baumé (the accent is not always present). One scale measures the density of liquids heavier ...
Bartholomew Sikes. An Act for establishing the Use of an Hydrometer, called Sikes's Hydrometer, in ascertaining the Strength of Spirits, instead of Clarke's Hydrometer. 56 Geo. 3. c. 140. Bartholomew Sikes (died 1803) [1] was an officer in the employ of HM Excise who in the late 18th century perfected a device by which the alcoholic content of ...
Hydrometry is the monitoring of the components of the hydrological cycle including rainfall, groundwater characteristics, as well as water quality and flow characteristics of surface waters. [1] The etymology of the term hydrometry is from Greek: ὕδωρ ( hydor) 'water' + μέτρον ( metron) 'measure'. Hydrometrics is a topic in applied ...
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