One of standard measuring device used in legal metrology is a vertical storage tank (also known as cylindrical tank) which is a standard measuring tank having a circular cross section and stands on a solid and fixed foundation. To maintain the truth value of a vertical storage tank, a calibrating and re-calibrating process must be carried out. Measuring instruments used in the calibrating and recalibrating process currently have several drawbacks, such as unaffordable prices and impractical use. In this study a cylinder tank volume measurement system was made by utilizing a laser distance gauge. The system using the travel time measurement principle in measuring the radius and height of the vertical storage tank to obtain the value of tank volume. To validate the system a miniature prototype of a vertical storage tank with an actual radius of 2.021 m and a height of 6.083 m was used. The instrument is positioned close to the center point of the vertical storage tank to measure its radius and height. The measuring tool rotates 360° to take 200 measurement data. From the experiment the instrument obtained the average volume measurements with an error of 3.087% and 3.283%.
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