- AL3 is a reliable engineering automatic level with 24x magnification. bright optics, push button compensator checking function. - 2mm standard deviation for 1km double run levelling.
AL2 is a precise automatic level:- With 32X magnification, 45mm objective aperture, 1m shortest focusing distance with push button compensator check. - Accuracy of 1mm standard deviation for 1km double run levelling....