The Leica NA720 optical level is the most robust optical level available. So robust it will keep on working through tough conditions. Even after a short drop on the floor, vibration from heavy machinery or a drop in water, the Leica NA720 Optical level will keep on working.
Leica NA720 Technical Specification:
Minimum target distance: 50cm enables you to work in the tightest conditions.
Magnification: 20x Standard deviation per km: 1.5 mm (double-run levelling)
Standard deviation at 30m: 1.0 mm (single measurement)
Compensator: Working range ± 12’, Setting accuracy
Standard deviation: <0.5’’ Horizontal circle: 360°/400gon
Graduation interval of Hz circle: 1°/1gon Impact standard: ISO 9022-33-5