Topcon AT-B4 24x Automatic Level | IPX6 Waterproof Survey Instrument

Overview

The Topcon AT-B4 24x Automatic Level is designed for precision and durability across surveying, engineering, and construction tasks. It speeds leveling with automatic compensation and keeps your line of sight steady, even in dynamic field environments where nearby activity can challenge sight alignment.

All weather reliability

Built to perform in tough conditions, the AT-B4 features an IPX6 rating. It resists powerful water jets from all directions, guarding the optics against rain, splashes, and damp sites so you can work with fewer interruptions.

Precision you can feel

A magnetic damping system minimizes the impact of vibrations from nearby equipment or traffic, helping you lock onto levels with confidence. The instrument also offers ultra-short focusing for fast sighting, with a near field focus of 20 cm (7.9 in) to accommodate tight spaces and quick checks.

Key features at a glance

• Rapid, Accurate, and Stable Automatic Compensation
• Ultra-Short 20cm (7.9 in) Focusing
• All-Weather Dependability
• Clampless, Endless Fine Horizontal Adjustments

Field performance and measurement options

With 24X magnification, the AT-B4 reveals fine graduations for precise leveling and staking. The 360-degree horizontal circle supports full azimuth measurement, while the Sighting Guide and 1:100 Stadia help interpret distances and align points. An approximate range of up to 250 feet adds versatility across site sizes.

Real-world use cases

In busy sites, quickly establish level lines along trenches or road alignments, or verify benchmarks with fewer rechecks. Near heavy equipment or along busy routes, the magnetic damping contributes to a steadier sight line, enabling efficient workflow without overburdening the operator.

What’s in the box

• Auto Level
• Hard-Shell Carry Case
• Lens Cleaning Cloth
• Allen Wrench
• Operator Manual