Topcon Auto Level Instrument - Waterproof Magnetic-Damping Survey Tool from China Suppliers and 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 makes the compensator of the AT-B Series durable and stable?
The compensator incorporates four suspension wires made of super-high-tensile metal that features a minimal thermal expansion coefficient. Additionally, it has a finely tuned magnetic damping system that quickly levels and stabilizes the line-of-sight even near heavy equipment or busy roadways.
Can the AT-B Series levels be used in confined spaces?
Yes. The AT-B Series features a short minimum focus distance of just 20 cm (7.9 inches) from the end of the telescope, which significantly facilitates working in tight or confined spaces.
What water resistance rating does the AT-B Series have?
The AT-B Series features an IPX6 rating (IEC 60529: 2001), meaning it is protected against powerful water jets from all directions and can withstand sudden showers or torrential rain while preventing clouding inside the telescope.
How are horizontal angles measured with these instruments?
Horizontal angles can be directly read in 1° or 1 gon units. The circle features a free rotation design for reading any angle from zero, and it is covered to protect against dirt and scratches.
What are the main differences between the AT-B2, AT-B3, and AT-B4 models?
The main differences lie in magnification and accuracy: the AT-B4 has 24x magnification and 2.0mm accuracy; the AT-B3 has 28x magnification and 1.5mm accuracy; and the AT-B2 has 32x magnification (up to 40x optional) with 0.7mm accuracy (improving to 0.5mm with an optional micrometer).