plumb bob

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Related to Plumb-bob: plumb line

plumb bob

[′pləm ‚bäb]
(engineering)
A weight suspended on a string to indicate the direction of the vertical.

plumb bob, plummet

A shaped metal weight which is suspended from the lower end of a line to determine the vertical. (See illustration p. 744.)
References in periodicals archive ?
Available products range from electronic proximity sensors, capacitance level controls, vibrating probes, to electromechanical plumb-bob continuous-level sensors and paddle-type, point-level units.
Available products range from electronic proximity sensors, capacitance level controls, to electro-mechanical plumb-bob continuous-level sensors and paddle-type, point-level units.