Uzbekistan electricity producer in Central Asia. Renewable energy constitutes more than 23% of the country's energy sector, with hydroelectricity and solar energy having 21.4% and 2% respectively. Uzbekistan has an area of . It is the 56th largest country in the world by area and the 42nd by population. Among the CIS countries, it is the 4th largest by area and the 2nd largest by population. Uzbekistan lies between latitudes 37° and 46° N, and longitudes 56° and 74° E. It stretches from west to east and from north to south. Bordering Kazakhstan and the Aral Sea to the north and
Disappearing-filament pyrometer Disappearing-filament pyrometer The disappearing-filament pyrometer is an optical pyrometer, in which the temperature of a glowing incandescent object is measured by comparing it to the light of a heated filament. Invented independently in 1901 by Ludwig Holborn and Ferdinand Kurlbaum in Germany and Harmon Northrup Morse in the United States, it was the first device which could measure temperatures above 1000°C. Disappearing filament pyrometers have been used to measure temperatures between about 600°C and 3000°C. Like other optical pyrometers they are used to measure the temperature of objects too hot for contact thermometers, such as molten metals. Widely used in