PRODUCT DESCRIPTION
KEY FEATURES
*Rapid and Durable Compensator
The compensator of B20/B30A/B40A incorporates four suspension wires made of super-high-tensile metal that features minimal thermal expansion coefficient, providing unmatched durability and accuracy. Finely tuned magnetic damping system quickly levels an dstabilizes the line of sight despite the fine vibrations present when working near heavy equipment or busy roadways
*Horizontal Circle for Angle Measurement
Horizontal angles can be directly read in 10 or 1gon units. Free rotation feature allows you to read any angle from zero.
*20cm utra-short minimum focus
The B20/B30A/B40A can focus on objects on 20cm (7.9 in) in front of the telescope. This feature dramatically facilitates the works in confined spaces.
*All-Weather Dependability
With the IPX6 rating, the instrument is protected against powerful water jets from all directions, meaning the B20/B30A/B40A withstands a sudden shower or torrential rainfall. The advanced protection design also deters douding condensation inside the telescope.
PRODUCT SHOW
PRODUT SPECIFICATION
| TELESCOPE | B20 | B30A | B40A |
| Length | 215mm (8.46 in) | 214mm (8.42 in) | 214mm (8.42in) |
| 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 | 1020' | 1025' | 1025' |
| 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-peed | 1-peed | 1-peed |
| Sighting Aid | Peep sight | Peep 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 | ±15ft. | ±15ft. | ±15ft. |
| CIRCULAR LEVEL | |||
| Sensitivity | 10ft/ 2mm | 10ft/ 2mm | 10ft/ 2mm |
| HORIZONTAL CIRCULE | |||
| Diameter | 103mm(4.1 in) | 99mm(3.9 in) | 99mm(3.9 in) |
| Minimum division | 10/1gon | 10/1gon | 10/1gon |
| GENERAL | |||
Water resistance | IPX6 (IEC 60529: 2001) | ||
| Operating temperature | -40F~+1220F (-20ºC~+50ºC) | ||
| Width | 5.12 in (130mm) | 4.8 in (122mm) | 4.8 in (122mm) |
| Length | 8.46 in (215mm) | 8.4 in (214mm) | 8.4 in (214mm) |
| Height | 5.51 in (140mm) | 5.51 in (140mm) | 5.51 in (140mm) |
| Weigth | 4.1 lbs (1.85kg) | 3.3 lbs (1.5kg) | 3.3 lbs (1.5kg) |
PAYMENT 
COMPANY INFORMETION
Shanghai Hexin Survey Instrument Co., LTD has 8 years' experience in geodetic surveying and cadastration surveying, we are a professional and leading enterprise in the surveying industry in MainlandChina. We specialize in the R&D and manufacturing and sales of all kinds of surveying products, including total station, electronic theodolite, electronic distance meter, automatic level, laser level, reflector prism, surveying accessory, GPS receiver, mapping software, etc.The marketing model advocated by us is not a simple sense of "selling products", instead, pre-sales service, services during operation and after-sales service are integrated in entire operating activities. It makes the customers feel that they purchased not only a commodity, but also a professional service.We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success!
FAQ
Q:How to turn off voice broadcast of receiver?
A: a. Enter the WEBUI, find the voice switch in the settings page and turn it off.
b. Controller Software→Device→Device Setting, turn off the "enable voice", and click"ok"
Q: Can the base station and rover station be interchangeable?
A: The difference between the rover station and the base station is that the accessories are different, the function and hardware configuration are the same.You can use the controller to choose the working mode of the device and set it as the base station or rover station.
Q: What is CORS?
A: CORS is called a continuous operating reference station system. It can be understood as a bas e station that is erected at a fixed known point and works continuously for 24 hours and sends its own data to a specific serverthrough the network. The use of CORS operation eliminates the need for a base station, and CORS is equivalent to a base station in a normal network operation.