AT-B Series Automatic Level

Durable – dependable – high value auto levels


The Topcon AT-B Series Automatic Level has been upgraded to present a smaller lightweight design while still enhancing the features of the level. It enables surveyors and construction professionals to perform highly accurate leveling, angle, height, and distance measurements. Offering a minimum focus range of up to one foot, this auto level also has a leveling accuracy of up to 1/16 inches making it a perfect choice for engineering and construction works.

This AT-B-Series automatic level retains its superior optics and promotes better visibility. With a stable and durable magnetic dampened compensator, this surveying and construction tool levels the line of site within the range of ±15 arc minutes and an accuracy of 0.5 arc-second. Additionally, it is designed with improved tangents and knobs, while its increased gear ratio allows it to withstand shock and vibration.

  • 3 Models – 32x, 28x and 24x magnifications
  • Rapid, accurate, and stable automatic compensation
  • Ultra-short 20cm focusing
  • All-weather dependability
  • Endless fine horizontal adjustments
  • Clampless Endless fine horizontal adjustments
  • + 5 Degrees self-leveling range

AT-B2: 32x
AT-B3: 28x
AT-B4: 24x
Pendulum compensator with magnetic damping system
Certifications and Standards
(IEC 60529:2001)
Operating Temperature
-4ºF to +122ºF
(-20ºC to +50ºC)
Physical and Environmental
5.12 in. (130mm) x W
8.46 in. (215mm) x D*
5.51 in. (140mm) x H **
5.31 in. (135mm) x H
AT-B2: 4.1 lbs. (1.85kg)
AT-B3: 3.7 lbs. (1.7kg)
AT-B4: 3.7 lbs. (1.7kg)


Additional information


AT-B4A/PS, Auto Level, X24, Degree, AT-B3A/PS, Auto Level, X28, Degree, AT-B2 32x Auto Level w/horizontal circle


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