Tube Solarimeter

Tube Solarimeter. A thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object) A thermometer has two important elements (1) a temperature sensor (eg the bulb of a mercuryinglass thermometer or the pyrometric sensor in an infrared thermometer) in which some change occurs with a change in temperature and (2) some.

光學雷達，或稱光達或雷射雷達（英語： lidar LIDAR LiDAR ，是英文「light detection and ranging」的縮寫） ，是一種光學 遙感技術，它通過向目標照射一束光，通常是一束脈衝雷射來測量目標的距離等參數。 雷射雷達在測繪學、考古學、地理學、地貌、地震、林業、遙感以及大氣物理等領域都有應用.

光學雷達 維基百科，自由的百科全書

Water enters the device by the bottom pipe (far end of the tube see picture) and electronic sensors measure its height and send the data to a tiny computer [citation needed] Historical data are available for about 1450 stations worldwide of which about 950 have provided updates to the global data center since January 2010.