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The metal-paper coil hygrometer is very useful for giving a dial indication of humidity changes. It appears most often in inexpensive devices, and its accuracy is limited, with variations of 10% or more. In these devices, water vapor is absorbed by a salt-impregnated paper strip attached to a metal coil, causing the coil to change shape.
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 ...
His name is best known for his invention of the Daniell cell, [2] an element of an electric battery much better than voltaic cells. He also invented the dew-point hygrometer known by his name, [ 3 ] and a register pyrometer ; [ 4 ] and in 1830 he erected in the hall of the Royal Society a water- barometer , with which he carried out a large ...
With the inventions of the hygrometer and thermometer, the theories of combining the two began to emerge during the sixteenth and seventeenth centuries. In 1818, a German inventor, Ernst Ferdinand August (1795-1870), patented the term “psychrometer”, from the Greek language meaning “cold measure”.
1885 — Calender-Van Duesen invented the platinum resistance temperature device; 1887 — Richard Assmann invents the psychrometer (Wet and Dry Bulb Thermometers) 1892 — Henri-Louis Le Châtelier builds the first optical pyrometer; 1896 — Samuel Siegfried Karl Ritter von Basch introduced the Sphygmomanometer to measure blood pressure
In 1783, the first hair hygrometer is demonstrated by Horace-Bénédict de Saussure. In 1806, Francis Beaufort introduced his system for classifying wind speeds . [ 4 ] The April 1960 launch of the first successful weather satellite, TIROS-1 , marked the beginning of the age where weather information became available globally.
A thermo-hygrograph. A thermo-hygrograph or hygrothermograph is a chart recorder that measures and records both temperature and humidity (or dew point).Similar devices that record only one parameter are a thermograph for temperature and hygrograph for humidity.
Johann Heinrich Lambert (German: [ˈlambɛɐ̯t]; French: Jean-Henri Lambert; 26 or 28 August 1728 – 25 September 1777) was a polymath from the Republic of Mulhouse, generally identified as either Swiss or French, who made important contributions to the subjects of mathematics, physics (particularly optics), philosophy, astronomy and map projections.