Spirit level
Spirit levels
Spirit level is one of the most commonly
used instruments for inspecting the horizontal position of surfaces and for
evaluating the direction and magnitude of minor deviation from that nominal
condition.
It
essentially consists of a close glass tube of accurate form. It is called as
the vial. It is filled almost entirely with a liquid, leaving a small space for
the formation of an air or gas bubble.
To
reduce the effect of heat transfer in handling spirit levels are made of a
relatively stable casting and are equipped with thermally insulated handles.
