APPARATUS AND METHOD OF FLUID LEVEL MEASUREMENT

摘要

An apparatus for fluid level measurement comprises an upright tube ( 10 ) extending into a storage tank ( 12 ) substantially the full height distance of the tank ( 12 ). An acoustic transducer ( 14 ) is positioned at the top of the tube ( 10 ) and adapted to emit a sound pulse to be bounced off the surface ( 16 ) of the fluid level within the tube ( 10 ) and to receive a reflected pulse. Means is provided for measurement of the time of arrival of the reflected sound pulse. An acoustic coupling means is provided for the transducer ( 14 ) to shape and increase the amplitude of the pulse emitted from the transducer ( 14 ) together with an increase in the amplitude of the voltage produced by the transducer ( 14 ) in response to the received reflected pulse.