Datum AL20 Optical Auto/Dumpy Level :

20x Magnification 2.5mm Standard Deviation for 1km double run levelling Comes with Case and Accessories Includes: Adjustable Aluminium Tripod 5 Metre English E Telescopic Staff 360 Degree Horizontal Circle Robust Cast Case Construction Rubberised Eyepiece On Board Compensator Check Facility Technical Data Telescope Magnification Clear Objective Aperture Field of View Shortest Focussing Distance Multiplication Factor Additive Factor AL20 Erect 20x 30mm 1 Deg 30’ 0.5m 100 0 Compensator Working Range Setting Accuracy Bubble Sensitivity Circle Graduation Standard Deviation for 1km Double Run Levelling Weight +/- 15’ +/- 5” 8’/2mm 1 Degree 2.5mm 1.3kg 5 Year Warranty