Topcon AT-B Series Auto Level

Topcon AT-B Series Auto Level


Super quick leveling with stabilized line of sight

Thanks to the finely tuned auto-collimation system, the Topcon line of AT-B autolevels are the ideal device for determining height differentials on busy and noisy job sites. With a completely new small lightweight design, they have excellent visibility of horizontal circle, superior gear ratio for shock and vibration and improved tangents and knobs.

• 3 Models - 32x, 28x and 24x magnifications
• Rapid, accurate, and stable automatic compensation
• Ultra-short 20cm focusing
• All-weather dependability
• Endless fine horizontal adjustments


Telescope AT-B2 AT-B3A AT-B4A
Magnification 32x 28x 24x
Field of View 1°20’ 1°25’ 1°25’
Min. Focus Distance 0.3 m 0.3 m 0.3 m
Image Erect Erect Erect
Stadia Constant 100 100 100
Focussing Speed 2 Speed 1 Speed 1 Speed
Accuracy (1Km Double Run) 0.7 mm 1.5 mm 2.0 mm
Compensator System Magnetically Dampened Magnetically Dampened Magnetically Dampened
Compensator Accuracy 0.3” 0.5” 0.5”
Compensator Range ±15’ ±15’ ±15’
Horizontal Circle
Water Rating IPX6 IPX6 IPX6
Operating Temperature -20°C to 50°C -20°C to 50°C -20°C to 50°C
Width 122 mm 122 mm 122 mm
Length 215 mm 214 mm 214 mm
Height 140 mm 140 mm 140 mm
Weight 1.85 kg 1.5 kg 1.5 kg
AT-B Series Options
Tripod and Staff Options
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