Detail Specification:
World-Proven Precision and Durability
Topcon Auto Level At-B4A
| Specifications Model | AT-B4A |
| Telescope |
| Length | 215mm (8.46in.) |
| Magnification | 32x |
| Objective aperture | 42mm (1.65in.) |
| Resolving power | 3" |
Field of View
(at 100m/328ft.) | 1°20'
(2.3m / 7.5ft.) |
| Minimum focus | 0.2m (7.9in.) from end of telescope
0.3m (1ft.) from instrument center |
| Image | Erect |
| Reticle pattern | Wedge |
| Stadia constant | 0 |
| Stadia ratio | 100 |
| Focusing knob | 2-speed |
| Sighting aid | Peep sight |
| Lens hood | Retractable |
| Accuracy (standard deviation for 1km double run leveling) |
| Without micrometer | 0.7mm
(0.03in.) |
| With micrometer | 0.5mm
(0.02in.) |
| Compensator |
| Type | Pendulum compensator with magnetic damping system |
| Setting accuracy | 0.3" |
| Working range | ±15' |
| Circular level |
| Sensitivity | 10' / 2mm |
| Mirror | Pentaprism |
| Horizontal circle |
| Diameter | 103mm (4.1 in.) |
| Graduations | 1° / 1gon |
| General |
| Horizontal motion drive | Clampless, endless, double-sided knobs |
| Water resistance | IPX6 (EC 60529:2001) |
| Operating temperature | -20 to +50°C (-4 to +122°F) |
| Width | 130mm (5.12in.) |
| Length | 215mm (8.46in.) |
| Height | 140mm (5.51in.) |
| Weight | 1.85kg (4.1 lb.) |
We can use the different international express company, usually,
our first choice is DHL. if you have specified requirement , please inform us before the order.
Our Services
your inquiry will be replied within 24 hours, we welcome your email
and call at any time.
our products are original and 100% new. and they will be carefully
checked before we ship them out.
we provide one year quality warranty, within one year since you
bought the products from us, you will get our technology support.
Company Information
Shanghai Galxy International Trade company, Ltd. combining with
developing, researching and producing. Our company is located in
Pudong Developing Zone, and has two subsidiary companies: Shanghai
Galaxy International Trade Co., Ltd. and Mato Opto-electrical
High-tech Company. Our company has researching center and factory
in Changzhou.
Our main products are as following: total station, electronic
theodolite, automatic level, laser level, rotation laser, GPS,
distance laser sensor and accessories, such as tripod, prism, pole,
staff and USB cable for total station. Our company designs software
for many domestic and oversea factories, for example, Boif, TJOP,
Stanley, and Cst-Berger. We have powerful capacity in technical
research, and the products we designed have advanced technology and
steady performance. The non-prism total station and the absolute
coding measure instrument we developed and produced have very
competitive points in the measure instrument market.
We expect that we could cooperate with more business partners from
all over the world. In addition, we can do OEM service for
companies or dealers that want to find better producers in China.
Our goal is to produce the best surveying instruments in the world.
Our target is to globalize the market, internationalize the quality
and maximize the profit!
