Description
New Geo-Fennel GFN 1 Automatic Optical Level 32x Set complete
with 1.65m tripod and 5m telescopic levelling staff.
Recommended for Builders, Landscapers, Farmers, Groundworkers and Surveyors.
Precision high-quality engineering from Geo-Fennel in Germany.
Promotion Offer:
Save £20.00 plus VAT by buying all items as a set!
(Original total price £249.95 plus VAT, now £229.95 plus VAT).
How it works
It works like a precision telescope, with an artificial target line
generated at a specified height – the horizontal reference.
An automatic compensator adjusts the target line in the horizontal plane.
Distances can be estimated using the stadia lines with the E-graduations on the measuring staff.
The 21st Century version of the Cowley Level and the Dumpy Level.
Recalibration:
Full details and tools included for owner accuracy check and re-calibration.
Measuring with an optical level:
To determine the height difference in the example shown below,
the levelling staff is first set up at point A.
The optical system of the level has automatically aligned itself horizontally.
With the help of the optical sight marking, it is now possible to read off
the difference in height between Point A and the sight line shown in blue.
The staff can now be positioned at any Point B, and the second height difference measured.
Calculation of height difference:
Height A – Height B = Height difference H
Long distance scale with E-graduations:
This special form of scale graduation can easily be read even over
long distances when the the cm divisions are no longer visible.
The E-blocks are 5cm high and the red and black are meter divisions.
Distance estimating with an optical level:
Read the upper and lower values of the stadia lines.
These are the graduations above and below the crosshairs in the telescope.
Multiply the difference of these values by
the factor of 100 and the result is the distance in meters.
Technical Specification: Geo Automatic Optical Level 32x Set – Promotion
Standard deviation 1.5mm/km double levelling
Magnification 32x
mm/cm estimation to 100m/to 200m
Minimum Focusing distance 0.4m
Graduation 1° x 360° circle
Objective diameter 36mm
Field of view 1°30′
Compensator Magnetic damping
Range of operation ±12′
Accuracy 0.3″
Compensation time <2 seconds
Level bubble Accuracy 8’/2mm
Operating temperature -10°C to +40°C
Protection IP54 dust/water
Weight 6.0kg/set
Mfrs Ref No GAL32S
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