Water Level

A water level is a device used for matching elevations of locations that are too far apart for a spirit level to span. The simplest water level is a section of clear tubing, partially filled with water. Water is easily procured for use, and easily discarded after use. The ends are held vertical, and the rest of the tubing lies on the ground or floor. The water level at each end of the tube will be at the same elevation, whether the two ends are adjacent or far apart. Water levels have been used for many years. The water level is lower-tech than the laser level, but it can be more accurate over long distances. To avoid error, all of the water should be at the same temperature. Other sources of error include difficulty reading due to meniscus.

If the water level is used often, dye can be added to the water to make it easier to see. If the water level is used outdoors in winter, antifreeze can be added to the water.

Famous quotes containing the words water and/or level:

    This sand seemed to us the connecting link between land and water. It was a kind of water on which you could walk, and you could see the ripple-marks on its surface, produced by the winds, precisely like those at the bottom of a brook or lake. We had read that Mussulmans are permitted by the Koran to perform their ablutions in sand when they cannot get water, a necessary indulgence in Arabia, and we now understand the propriety of this provision.
    Henry David Thoreau (1817–1862)

    On a level plain, simple mounds look like hills; and the insipid flatness of our present bourgeoisie is to be measured by the altitude of its “great intellects.”
    Karl Marx (1818–1883)