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TOPCON AUTO LEVEL AT-B Series

TOPCON AUTO LEVEL AT-B Series
TOPCON AUTO LEVEL AT-B Series
Product Code : 50
Product Description
TELESCOPE AT-B2 AT-B3 AT-B4
Length 215mm (8.46 in.) 215mm (8.46 in.) 215mm (8.46 in.)
Magnification 32X 28X 24X
Objective Aperture 42mm (1.65 in.) 36mm (1.42 in.) 32mm (1.26 in.)
Resolving Power 3 in. 3.5 in. 4 in.
Field of View 1°20’ 1°25’ 1°25’ (at 100m/328ft.)
(at 100m/328ft.) (2.3m/7.5 ft.) (2.5m/8.2 ft.) (2.5m/8.2 ft.)
Min. Focus from end of telescope 0.2m (7.9 in.) 0.2m (7.9 in.) 0.2m (7.9 in.)
Min. Focus from instrument center 0.3m (1 ft.) 0.3m (1 ft.) 0.3m (1 ft.)
Image Erect Erect Erect
Stadia Constant 0 0 0
Stadia Ratio 100 100 100
Focusing Knob 2-speed 1-speed 1-speed
Sighting Aid Peep Sight Gun Sight Gun Sight
ACCURACY AT-B2 AT-B3 AT-B4
Without Micrometer 0.7mm (0.03 in.) 1.5mm (0.06 in.) 2.0mm (0.08 in.)
With Micrometer 0.5mm (0.02 in.) n/a n/a
COMPENSATOR AT-B2 AT-B3 AT-B4
Type Pendulum compensator with magnetic damping system
Setting Accuracy 0.3 in. 0.5 in. 0.5 in.
Working Range ±15 ft. ±15ft. ±15 ft.
CIRCULAR LEVEL AT-B2 AT-B3 AT-B4
Sensitivity 10 ft./2mm 10 ft./2mm 10 ft./2mm
HORIZONTAL CIRCLE AT-B2 AT-B3 AT-B4
Diameter 103mm (4.1 in.) 103mm (4.1 in.) 103mm (4.1 in.)
Minimum Division 1°/1gon 1°/1gon 1°/1gon
GENERAL AT-B2 AT-B3 AT-B4
Water Resistance IPX6 (IEC 60529:2001)
Operating Temperature -4°F to +122°F (-20ºC to +50ºC)
Width 5.12 in. (130mm) 5.12 in. (130mm) 5.12 in. (130mm)
Length 8.46 in. (215mm) 8.46 in. (215mm) 8.46 in. (215mm)
Height 5.51 in. (140mm) 5.51 in. (140mm) 5.31 in. (135mm)
Weight 4.1 lbs. (1.85kg) 3.7 lbs. (1.7kg) 3.7 lbs. (1.7kg)