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Double Prism Optical Square
| Model: | Double Prism Optical Square |
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| Ref Code: | 4501436 |
| Price | £65.00 |
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Double Prism Optical Square Product Information
The hand held double prism optical square comprises of two penta prisms of quality optical glass in a sturdy aluminium housing. The cover of the housing rotates to protect the prisms when the prism is not in use. This sighting arrangement ensures exact coincidence of the images of the observed targets (normally ranging poles) and allows the instrument to be used for determining right angles to the left and right and for placing points on line.
The accuracy of a right angle set out with the optical square is approximately ±1cm at 30m.
Used for: Placing points on line, Setting out curves, Offset measurements, Determining the horizontal, Detail plans and area masurement, Simple height measurements.
