0 a tool consisting of a bar containing a glass tube of liquid, for testing whether a surface is level. -- timbang air
Where a spirit level must also be usable upside-down or on its side, the banana-shaped tube is replaced by a barrel-shaped tube.
An extension of the spirit level is the bull's eye level: a circular, flat-bottomed device with the liquid under a slightly convex glass face with a circle at the center.
Early spirit levels had banana-shaped curved glass vials at each viewing point.
The tube was fixed to a clamp stand and set horizontally using a spirit level.
It was archived by means of a spirit level, used to fixate it to the robot before the experiment was carried out.
It is at that time and not before that deep and detailed arguments about such matters as the alcoholic spirit level take place.
The aim of a measurement is to measure the surface on which the dial gauge or spirit level is placed horizontal.
In the middle of the spirit level is a small window where the bubble and the tube is mounted.
