Topcon AT-B4
Rapid, Stable and Durable Compensator.
The compensator of AT-B series incorporates four suspension wires made of super-high tensile metal that features minimal thermal expansion coeffcient, providing unmatched durability and accuracy even in the harshest environmental conditions. Finely tuned magnetic damping system quickly levels and stabilizes the line of sight despite the fine vibrations present went working near heavy equipment or busy roadways.
Features : 24x Magnification, Waterproof to IPX6 rating, short focus (1.6 ft. min.) magnetic damping, 360-degree horizontal circle, sighting guide, 1:100 stadia, approximate range-250 feet.
Specification
| AUTO LEVELS | AT-B2 | AT-B3 | AT-B4 | |
| Telescope: | ||||
| Length (mm/in.) | 215/8.46 | 215/8.46 |
215/8.46 | |
| Image | Erect | Erect | Erect | |
| Magnification | 32x | 28x |
24x | |
| Objective Lens (mm/in.) | 42/1.65 |
36/1.42 | 32/1.26 | |
| Relative Brightness | 1.78 | 1.33 | 1.56 |
|
| Field Of View | 1° 20' | 1° 25' | 1° 25' | |
| Resolving Power | 3.0" | 3.5" | 4.0" |
|
| Minimum Focus (m/ft.) | 0.3/1 | 0.3/1 | 0.53/1 | |
| Stadia Constant | 0 | 0 |
0 | |
| Stadia Ratio | 100 | 100 | 100 |
|
| Sensitivities of Levels: | ||||
| Main Level (/2mm) | — | — |
— | |
| Circular Level (/2mm) | 10' |
10' | 10' | |
| Tilting Range | — | — |
— | |
| Automating Leveling: | ||||
| Setting Accuracy | ± 0.3" | ± 0.5" |
± 0.3" | |
| Compensating Range | ± 15' |
± 15' | ± 15' | |
| Accuracy 1km Double Run Level: |
||||
| Without
Optical Micrometer (mm) | ± 0.7 | ± 1.5 |
± 2.0 | |
| With Optical Micrometer (mm) | ± 0.5 | — | — | |
| Horizontal Circle: | ||||
| Diameter (mm/in.) | 103/4.1 | 103/4.1 |
103/4.1 | |
| Minimum Division | 1° (1gon) |
1° (1gon) | 1° (1gon) | |
| Weight: | ||||
| Instrument (kgs/lbs.) | 1.85/4.1 | 1.7/3.7 | 1.7/3.7 | |
| Water Resistance | IPX6 |
IPX6 | IPX6 | |
| Optional Accessories: | ||||
| Diagonal Eyepiece | ||||
| Optical Micrometer | ||||
| Illuminator 3 | ||||
| 40x Eyepiece | ||||
| Centering Eyepiece | • |
• | • |
In The Box
- Allumunium Tripod
- Rambu ukur / levelling staff
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Bank Mandiri Bank BNI No. Rek. 155 00000 10143 No.rek.0175633852 A/N: Yuli Pristiyani A/N: Yuli Pristiyani