Spirit level
INSTRUMENT WITH A SEALED TUBE OF LIQUID, DESIGNED TO INDICATE WHETHER A SURFACE IS HORIZONTAL (LEVEL) OR VERTICAL (PLUMB)
Waterlevel; Spirit-level; Bubble level; Torpedo level; Tube level; Level (tool); Spirit Level; Carpenter's level
A spirit level, bubble level, or simply a level, is an instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb). Different types of spirit levels may be used by carpenters, stonemasons, bricklayers, other building trades workers, surveyors, millwrights and other metalworkers, and in some photographic or videographic work.