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    OPTICAL PLUMMET  
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  Surveying Instrument Collection 

Maker

Hewlett-Packard, Loveland, USA

Model

Optical Plummet HP 11424A

Serial Number

none

Dimensions

72 mm diameter, 75 mm high (eyepiece rotates with a diameter of 85 mm)

Image

HP11424A Optical Plummet

Description

The HP 11424A optical plummet can only be used in connection with the HP 11426A tribrach ('levelling base'). It was designed for the HP 3820A electronic tacheometer and its associated EDM reflectors.

The eyepiece of the plummet can be rotated about the vertical axis. It uses a friction coupling and travels within a circle of 85 mm diameter.

The optical plummet carries a circular bubble on top.

History & comments

See brochure HP "Civil Engineering Products" (Part No. 5952-9153) for details.

Conservation

In original carrying case (136 mm x 90 mm x 125 mm)

Condition

In mint condition. Snap lock of case rusted.

Remarks

Feltpen marking P.C. 44731

Dates

Catalogued in 2007 by JMR. Photo by JMR.

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