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A hygrometer is an instrument which measures the humidity of air or some other gas: that is, how much of it is water vapor. [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.
It was invented by Daniel Gabriel Fahrenheit (1686–1736), better known for his work in thermometry. The Nicholson hydrometer , after William Nicholson (1753-1815), is similar in design, but instead of a weighted bulb at the bottom there is a small container ("basket") into which a sample can be placed.
Claude Shannon (1916–2016), founder of information theory and modern cryptography, invented Minivac 601, and co-invented the first wearable computer (with Edward O. Thorp) Ugo Cerletti (1877–1963), together with Lucio Bini (1908–1964), Italy – Electroconvulsive therapy; Leona Chalmers (c. 1937), U.S. – modern menstrual cup
Standard National Oceanic and Atmospheric Administration rain gauge. A rain gauge (also known as udometer, pluviometer, ombrometer, and hyetometer) is an instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation in a predefined area, over a set period of time. [1]
A Campbell–Stokes sunshine recorder. A sunshine recorder is a device that records the amount of sunshine at a given location or region at any time. The results provide information about the weather and climate as well as the temperature of a geographical area.
The manuals are aimed at beginner and advanced DIY consumers rather than professional mechanics. Later, the series was expanded to include a range of parody practical lifestyle manuals in the same style for a range of topics, including domestic appliances , personal computers, digital cameras , model railways , sport, and animal care.
He invented the cyanometer for estimating the blueness of the sky, [10] [11] the diaphanometer for judging the clarity of the atmosphere, the anemometer and the mountain eudiometer. [ 6 ] Of particular importance was a hair hygrometer that he devised and used for a series of investigations on atmospheric humidity, evaporation, clouds, fogs and ...
Perhaps "An hygrometer is one of several instruments that can be used to measure the density or specific gravity of liquids..." would be an appropriate way of introducing the fact that the hydrometer has modern - and much more accurate and versatile - incarnations.