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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.
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.
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The hygrometer, made of cardboard, shows a figure consisting of a friar of the Capuchin Order [3] with an open book in his right hand and the left arm and the hood of the habit mobile thanks to balanced axes; In this arm he carries a bar thanks to which he indicates the weather approximately 24 hours in advance on various signs arranged from top to bottom on a column while he moves his hood to ...
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.
A simple soil moisture sensor for gardeners. Soil moisture sensors measure the volumetric water content in soil. [1] Since the direct gravimetric measurement of free soil moisture requires removing, drying, and weighing of a sample, soil moisture sensors measure the volumetric water content indirectly by using some other property of the soil, such as electrical resistance, dielectric constant ...
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.