Nedo Precision Invar Leveling Rods
Nedo precision Invar leveling rods are used for first-order leveling and for challenging work on large scale construction sites, for example tunnels, roads, dams or power plants. The graduation of the precision Invar leveling rods is engraved in the paint coating with
an interferometrically controlled laser beam, ensuring superior graduation accuracy and edge sharpness. Random graduation errors are less than ± 0.015 mm.
Nedo precision Invar leveling rods outperform the requirements of DIN 18717 / ISO 12858-1 and set standards in terms of accuracy.
The European research centre CERN operates the world’s largest particle accelerator. Here elementary particles are accelerated to nearly the speed of light and then made to collide. Scientists use these experiments to explore conditions at the time of the Big Bang, when matter came into being. The experiments are performed in a 27 km ring of superconducting magnets. These magnets as well as countless of sensors must be kept in perfect alignment.
Exact horizontal positioning of these components over a distance of 27 km was a huge technical challenge. It was solved with Nedo precision Invar levelling staffs. The photo
shows the inside of the tunnel. A Nedo precision Invar levelling staff has been placed at a reference point on the pipe.
Features
- Body of Invar rod made of rigid aluminum profile with anodized surface
- Yellow lacquered graduation side; print protected by a 0.1 mm polyester coating
- Invar tape seated in protected groove of staff profile and tensioned by soft spring to compensate the extension coefficient of the rod profile. Extension coefficient: < 1.5 x 10-6
- Foot plate slightly protrudes from rod body
- The foot plate is made of stainless chrome steel and is hardened and ground.
- Equipped with circular bubble and fold-away handles as a standard.
The handles are zinced and powder-coated.
Nedo Precision Invar Levelling Staffs
| Ref.-No. Graduation 15a | Ref.-No. Graduation 19a | Length | Weight |
| 391189 | 1 m | 3.0 kg | |
| 392185 | 392189 | 2 m | 4.3 kg |
| 393189 | 3 m | 5.5 kg |
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Product and application images
Precision Invar Leveling Rod Accessories
Nedo Telescopic Struts
Telescopic struts are available as accessories for 2 m and 3 m precision Invar levelling staffs. The easy to handle telescopic struts ensure a secure stand of the precision Invar levelling staffs.
Ordering data
Ref.-No. 399211 suitable for 2 m precision Invar staffs
Ref.-No. 399311 suitable for 3 m precision Invar staffs
Nedo Transport Case for 2 Invar Staffs
Case for safe transport and storage of Nedo precision Invar levelling staffs. The transport case is made up of a sturdy aluminium frame and strong plastic honeycomb structured wall panels. The corners feature robust protectors. Handles allow for an easy handling. In addition, the case has a foam lining to protect the precision Invar levelling staffs. The transport case can accommodate two precision Invar levelling staffs, one precision Invar levelling staff with telescopic struts or one precision Invar levelling staff with illumination.
Nedo Transport Case for 2 Invar Staffs with standard staff shoes
Ref.-No. 395111 for 1 m staff length
Ref.-No. 395121 for 2 m staff length
Ref.-No. 395131 for 3 m staff length
