Auto Level Suvey And Construction Instrument

YR-17 6" LONG HEAVY DUTY BRASS HAND LEVEL 2X maginification 6” long draw eyepiece extends to 7-1/2” Internally mounted bubble assembly SPECIFICATION Maginification 2x Length 6inch (15.2cm) Degrees(10min) n/a % Grade n/a

GA-W300-2 Portable Collimator for Autolevel and Theodolite Specifications 1 Quantity of Collimator tubes 2 pcs. 2 Focal Length of the Collimators 300mm 3 Working Range 2m to ∝ 4 Effective Aperture 50mm ( D/f’ = 1/6 ) 1/6 = 0.16 5 Graduating Scale of the Target Plate ( ∝) 15” 6 Graduating Scale of the Target Plate ( 2m) 30” 7 Elevating Range 0 - 60 mm 8 Max Loading Weight ≈ 20 kg 9 Working Vlotage 6V

NTDS serial auto level with magnetic damping for construction Survey Instrument Specification:　 Type NTDS20 NTDS24 NTDS28 NTDS32 Telescope Erect Zoom out 20X 24X 28x 32x Objective Lens Aperture 30mm 40mm Field of view 1°30' The mix Stadia 0.5m Stadia Ratio 100 Stadia Constant 0 Work Range ±12' Accuracy ±0.5' ±0.4' ±0.3' Blister Precision 8'/2mm Diagraph on scale 1° or 1gon Standard error per male 2.5mm 2.0mm 1.5mm 1.0mm Weight 1.3kg The size of Triple M16 or 5/8'

GAL serial Auto Level with air damping 20X/24X/28X/32X green/red color Specification:　 　 GAL20 GAL24 GAL28 GAL32 Standard Deviation for 1km 2.0mm 2.0mm 1.5mm 1.0mm Double-run Leveling Image Erect Erect Erect Erect Magnification 20X 24X 28X 32X Objective Aperture 40mm 40mm 40mm 40mm Field of View 1°20’ 1°20’ 1°20’ 1°20’ Minimum Focus 0.65m 0.65m 0.65m 0.65m Multiplication Constant 100 100 100 100 Additive Constant 0 0 0 0 Compensating Range +/-15' +/-15' +/-15' +/-15' Setting