NESTLE Double penta prism with case
Exact alignment of 90° angles
Technical Data
| Housing | Metal |
|---|---|
| Accuracy | < 1 arc second |
| Weight | 150 g |
| Product Number (PID) | 11908000 |
Highlights at a Glance
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It has two prisms (90° each to the right and left) and a centre view.
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The accuracy is less than 1`
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The metal housing with twist lock and latch makes the double penta prism robust against external blows.
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You also have the option of either attaching the double pentagon to a plummet pole or hooking in a cord plumb bob.
Description
The Double penta prism is a simple but important optical instrument for marking out right angles or checking right angles, for angling a point onto a straight line (i.e. for dropping the perpendicular from the point onto this straight line) and for aligning itself with a straight line. The double pentagon prism is simple to use. In the double pentaprism, two pentagonal glass prisms are placed one above the other. For measurements above a measuring point, place the prism on a plumb bob or hang a plumb line in the notch on the lower part of the housing. This makes it easy to determine the position of the prism vertically above a measuring point.
Scope of Delivery
Double penta prism
Case