Maker

Hewlett-Packard, USA

Model

HP 11405A

Serial Number

none

Dimensions

140 mm x 75 mm x 130 mm

Image

Description

This is an attachment for the Hewlett-Packard distance meters HP 3805A and HP 3800B (see Cat. Nos. 0404 & 0405). It was used to measure the vertical angle of an EDM line of sight (for later reduction of the measured 'slope' distance to horizontal).

The circle is graduated from -45 degrees to +45 degrees, with a least count of 20 minutes of arc. Reading on the vernier to 0.1 minute of arc.

History & comments

Conservation

In wooden carrying case (180 mm x 130 mm x 130 mm).

Condition

excellent

Remarks

See instruments 0404 and 0405. Photo by J. M. Rüeger.

Dates

Catalogued by J. M. Rüeger on 3 July 2001.