The inclined tube manometer or slant manometer Is an enlarged leg manometer with Its measuring leg inclined to the vertical axis by some angle. The Indignation Is done to expand the sole and thereby to Increase sensitivity. It is used to measure very small pressure differences. The manometer is tipped so that the liquid moves a longer distance through the tube as it rises. As the pressure applied on the well increases the manometer fluid rises in the inclined tube, indicating the pressure read across the graduated scale.