Topcon Auto Level - Waterproof Magnetic-Damping Survey Instrument | China Suppliers & Factory, 24x Magnification
Rapid, Stable, Durable Compensator
The compensator of AT-B Series incorporates four suspension wires made of super-high-tensile metal, which features minimal thermal expansion coefficient - providing unmatched durability and accuracy.
The finely tuned magnetic damping system quickly levels and stabilizes the line-of-sight despite the fine vibrations present when working near heavy equipment or busy roadways.
Horizontal Circle For Measurement
Horizontal angles can be directly read in 1° or 1 gon units. The free rotation feature allows you to read any angle from zero. The circle is covered for protection against dirt and scratches and the readout window is located below the eyepiece for quick reference.
20 cm - Short Minimum Focus
The AT-B Series can focus on objects 20 cm in front of the telescope. This feature dramatically facilitates working in confined spaces.
All-weather Dependability
With the IPX6 rating, the instrument is protected against powerful water jets from all directions, meaning the AT-B Series withstands a sudden shower or torrential rainfall. The advanced protection design also deters clouding or condensation inside the telescope.
There are three models available depending on your accuracy requirements:
- AT-B4: 24x, 2.0mm accuracy.
- AT-B3: 28x, 1.5mm accuracy.
- AT-B2: 32x magnification (40x optional), 0.7mm accuracy (0.5mm with an optional micrometer).
Specification
| 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 | 4.0 in |
| Field of View | 1°20' | 1°25' | 1°25' |
| At 100m/328ft | 2.3m(7.5ft) | 2.5m(8.2ft) | 2.5m(8.2ft) |
| 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 (1ft) | 0.3m (1ft) | 0.3m (1ft) |
| 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 (1 km double run leveling) | |||
| Without Micrometer | 0.7mm(0.03 in) | 1.5mm(0.06 in) | 2.0mm(0.08 in) |
| With micrometer | 0.5mm(0.02in) | N/A | N/A |
| Compensator | |||
| Type | Pendulum compensator with magnetic damping system | ||
| Setting Accuracy | 0.3 in. | 0.5 in. | 0.5 in. |
| Working Range | ±15' | ±15' | ±15' |
| CIRCULAR LEVEL | |||
| Sensitivity | 10'/ 2mm | 10'/ 2mm | 10'/ 2mm |
| HORIZONTAL CIRCLE | |||
| Diameter | 103mm(4.1 in) | 103mm(4.1 in) | 103mm(4.1 in) |
| Minimum division | 1°/1gon | 1°/1gon | 1°/1gon |
| General | |||
| Water resistance | IPX6 (IEC 60529: 2001) | ||
| Operating temperature | -4°F~+122°F (-20ºC~+50ºC) | ||
Frequently Asked Questions
What are the differences between the AT-B2, AT-B3, and AT-B4 models?
The main differences lie in magnification power and accuracy. The AT-B4 offers 24x magnification and 2.0mm accuracy. The AT-B3 features 28x magnification and 1.5mm accuracy. The high-end AT-B2 provides 32x magnification (with 40x optional) and 0.7mm accuracy, which can be further enhanced to 0.5mm using an optional micrometer.
How does the compensator stabilize the line-of-sight?
The compensator of the AT-B Series features four suspension wires made of super-high-tensile metal with a minimal thermal expansion coefficient. Combined with a finely tuned magnetic damping system, it quickly levels and stabilizes the line-of-sight, even when working near heavy machinery or busy roads where fine vibrations are common.
What is the minimum focusing distance of the AT-B Series?
The AT-B Series has an exceptionally short minimum focus distance of just 20 cm (7.9 inches) from the end of the telescope. This feature makes it highly efficient for leveling tasks in tight, confined spaces.
Can the AT-B Series levels be used in rainy weather?
Yes, the instruments feature an IPX6 rating, which protects them against powerful water jets from all directions. This allows the AT-B Series to withstand sudden downpours or torrential rainfall, while the advanced protection design prevents clouding and condensation inside the telescope.
How are horizontal angles read on these levels?
Horizontal angles can be directly read in 1° or 1 gon units. The free rotation design enables you to read any angle starting from zero. Additionally, the readout window is conveniently located below the eyepiece for quick reference, and the circle is covered for protection against dirt and scratches.