The NA2 universal automatic level meets all requirements regarding precision, convenience and reliability. It was designed by surveyors and development engineers with years of experience and who know what a field instrument has to be able to do. The NA2 soon pays for itself, because it can be used for all types of surveying job; on building sites for routine levelling, in engineering projects, and for geodetic control at all levels of accuracy.

Universal application

• Levelling of all types and all orders of accuracy
• Precise levelling and settlement determinations on buildings
• Routine heighting for the construction of roads, railways, pipelines, tunnels and so forth
• Setting-out work and control measurements on the construction site
• Area levelling of high accuracy
• Tacheometric levelling with the K-version on flat terrain by combining stadia and angular measurements with height reading
• Deformation measurement and monitoring of bridges
  

In principle, the NA2 can be set up on any Leica Geosystems tripod. In practice, for all-round purposes, we recommend the heavy-duty GST20 telescopic-leg tripod. For precise levelling the GST40 fixed-leg tripod is suitable because of its extreme rigidity.

The modular relationship between instrument and tripod is an advantage when transport space is limited.

The circular level only needs to be centred approximately to bring the compensator well into its working range of ~30', and so setting-up goes quicker. The bubble is viewed positively via a pentaprism and is monitored down the eyepiece.

Unlike the tubular level of a traditional instrument, the NA2 universal automatic level is relatively insensitive to direct solar radiation and an umbrella need only be considered for the most precise levelling.

The compensator is essentially a pendulum with a prism (4). The suspension system comprises four flexed tapes (1) made of a special alloy to ensure faultless functioning even at extreme temperatures. The compensator, which is located between the focusing lens and the crosshair reticle, is pneumatically damped against mechanical vibration and is screened against magnetic fields.

In the unlikely event that the compensator is damaged (and this can only happen as a result of extremely harsh treatment) it is replaced easily, being held only by three screws.

away and then float gently back to give the horizontal line of sight. This check, which takes less than a second, is technically perfect, as the pendulum itself is activated and swings through its full range. It is also immediately apparent if the bubble is not centred.

A comprehensive program of accessories enables you to expand the performance and applications range of each instrument. This way, you can match your equipment exactly to requirements. The possibilities are described in brochure “Survey accessories” 710 883en.

The NA2 is supplied in a foam-padded container made of high performance synthetic material. The foam padding absorbs all jolts and shocks. The container provides perfect protection for the NA2.