Topcon AT-B2 Automatic Level

The Topcon AT-B2 is a high-precision automatic optical level designed for professional elevation measurement and precision leveling. As the high-precision model in the AT-B Series, it combines a 32× telescope with a stable magnetic-damping compensator for accurate and repeatable field measurements.

The AT-B2 is particularly suitable for surveyors and engineering teams working on projects where elevation control and reliable optical observation are important.

Key Features

• 32× high-resolution telescope

• 0.7mm standard deviation for 1km double-run leveling

• Two-speed focusing for faster coarse and fine adjustment

• Magnetic-damping automatic compensator

• Optional OM5 optical micrometer for precision leveling

• Optional 40× eyepiece for enhanced observation

• Clampless endless horizontal fine adjustment

• Designed for demanding surveying and engineering applications

Precision Leveling with Optional Micrometer

The AT-B2 provides a practical route from conventional automatic leveling to higher-precision work. With its standard configuration, it already provides 0.7mm leveling accuracy. When equipped with the optional OM5 optical micrometer, it can achieve 0.5mm leveling accuracy and can be used for more demanding precision leveling applications.

Topcon also offers a 40× eyepiece for the AT-B2, giving surveyors additional flexibility when detailed staff observation is required.

Core Specifications

• Model: AT-B2

• Magnification: 32×

• Objective aperture: 42mm

• Standard deviation of 1km double-run leveling: 0.7mm

• Accuracy with optional optical micrometer: 0.5mm

• Minimum focus: 0.2m from telescope end

• Compensator working range: ±15′

• Protection: IPX6

• Operating temperature: -20°C to +50°C

• Weight: approximately 1.85kg

Applications

• Precision leveling

• Construction surveying

• Infrastructure projects

• Geodetic control

• Machine and equipment installation

• Elevation measurement

• Professional engineering surveying