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Nedo Precision Invar Levelling Staffs
Nedo Precision invar levelling staffs

Nedo precision Invar levelling staffs are used for first-order
levelling and for challenging work on large scale construc-
tion sites, for example tunnels, roads, dams or power plants.
The graduation of the precision Invar levelling staffs 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 levelling staffs outperform the
requirements of DIN 18717 / ISO 12858-1 and set standards
in terms of accuracy.
Precision invar levelling staff and telescopic strut
Features:
Available invar staff graduations:

    15a            17a             19a
    0.5 cm          1.0 cm          1.0 cm
Order data invar levelling staffs:
Ref.-No. Graduation Length Weight
391 185 15 A 1 m 3.0 kg
392 185 15 A 2 m 4.3 kg
393 185 15 A 3 m 5.5 kg
391 187 17 A 1 m 3.0 kg
392 187 17 A 2 m 4.3 kg
393 187 17 A 3 m 5.5 kg
391 189 19 A 1 m 3.0 kg
392 189 19 A 2 m 4.3 kg
393 189 19 A 3 m 5.5 kg
If desired, all invar staffs can be equipped
with telescopic struts (System Kern).


Telescopic struts

Ref-.No. Length
399 211 2 m
399 311 3 m
Options:
Inspection protocol
We can supply an inspection protocol for each invar staff. This protocol documents the devi-
ation of every individual stroke from the nominal dimensions. The inspection is likewise
made interferomatrically.

Wide staff shoes
If desired, all invar staffs can be equipped with wide staff shoes.
Please add -616 to the reference number of each invar staff
Universal Aladapter for Standard Staff Shoes
Universal Aladapter for Standard Staff Shoes
The universal adapter can be used to compensate for
small wall projections or similar shapes.

Ref.-No. 393 006
Transport case for two 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. The interior of the transport case, which
accommodates two invar staffs, is partly lined in felt to protect the staffs from abrasion and
collision damage.
Transport case for two invar staffs
Transport case for two invar staffs

Ref.-No. Length
395 111 for 1 m staff length
395 121 for 2 m staff length
395 131 for 3 m staff length
Transport case for two invar staffs
with wide staff shoes


Ref.-No. Length
395 211 for 1 m staff length
395 221 for 2 m staff length
395 231 for 3 m staff length
LED Invar Staff Illumination

LED Invar staff illumination for Nedo high precision invar
staffs. The Invar Staff Illumination allows measures to be
made with the invar staff and a digital level in absolute
darkness. It can be used for example in mines, tunnels,
night-time construction sites and for building monitoring.
The measurement results are just as precise as
measurements in daylight. Thanks to its compact design
and integrated power supply, the mobility of the invar staff
is not reduced. Highly efficient LEDs in combination with
a specially designed lens and an optimized electronic
unit ensure a long operating life. The lighting does not
weaken during the battery running time, so dependable
measurement is always possible. The system can be
fitted to an invar staff by the customer himself using
standard tools, and requires no maintenance. The
circular level of the invar staff is additionally lit to permit
precise measurements.

Technical data:
Order information:
Ref.-No.  
396 115 suitable for 3 m Leica bar code Invar staff
396 116 suitable for 2 m Leica bar code Invar staff
396 117 suitable for 3 m Trimble bar code Invar staff
396 118 suitable for 2 m Trimble bar code Invar staff

Detailed view
Detailed view