Surveying Instrument Collection
Maker |
Hewlett-Packard, USA |
Model |
HP 11405A |
Serial Number |
none |
Dimensions |
140 mm x 75 mm x 130 mm |
Image |
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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.
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History & comments |
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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. |