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What is Asmann psychrometer is useful for - and explain in detail?
A psychrometer is an instrument to measure the humidity of the air. Assmann psychrometer is a poable instrument to give accurate readings of wet and dry bulb temperatures of air. In this instrument, the air is drawn at a speed of 5 meters per second by clockwork fan. Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 809