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A dumpy level, builder's auto level, leveling instrument
or automatic level with the tilting varaiation - an older-style instrument that requires skilled use to set
accurately.-- is an optical instrument used in surveying and building to
transfer, measure, or set horizontal levels .After being set up on a tripod
to a leveled condition the operator looks through the eyepiece while an
assistant holds a tape measure at the point under
measurement to gather and transfer elevations (levels) during site
surveys or building construction.
Other types include :
The automatic level, self-levelling level or builder's auto level, includes an
internal compensator mechanism are the preferred instrument on building sites,
construction and surveying due to ease of use and rapid setup time.
A digital electronic level that is also set level on a tripod and reads a bar-coded
staff using electronic laser methods.
A laser line level is a tool combining a spirit level and/or plumb bob with a
laser to display an accurately horizontal or vertical illuminated line on a
surface the laser line level is laid against.
Theodolite consists of a movable telescope mounted within two perpendicular
axes, that when pointed at a desired objec,t can be measured with great
precision the angle of each of these axes
The transit variation-- used as a lightweight tool for construction sites--
is a theodolite featuring a telescope that could "flop over" to allow easy
back-sighting and doubling of angles for error reduction .
The builder's level is often mistaken for a transit, but is actually only a type of
inclinometer combining a spirit level and telescope.
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