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Sokkia B-Series Automatic Level

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Manufacturer: Sokkia

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Sokkia B-Series Levels:

World-Proven Precision and Durability
 
NEW Features
Completely NEW design
Same compensator from B20 series
Lightweight at 1.5 kg (3.3 lb) A 13% reduction from previous version.
Easy to grasp (compact body)
Better visibility of horizontal circle
Improved tangents/knobs
Increased gear ratio for shock and vibration

Sokkia B-Series automatic levels feature enhanced reliability under all environmental conditions. Tough, compact bodies are tightly sealed against water, humidity and dust (IPx6). The B-Series levels also provide quick setup, easy sighting, and superior durability against vibration and shock, ensuring the increased productivity over an extra-long period of time.
Models: B20 - 40x, B20 - 32x, B30 - 28x, B40 - 24x.
 
Precise, Reliable Automatic Compensator
The B-Series levels incorporate a very precise and reliable compensator. The technological superiority of Sokkia auto levels has been proven since the release of the best-selling B2 model in 1963. Four super-high tensile suspension wires and magnetic damping system ensure accuracy and stability even when exposed to temperature changes, vibrations or shock.
 
 
Superior Telescope
Optimally designed telescope provides exceptionally bright and sharp view that reduces operator's eye strain. Ultra-short focus distance of 20cm (7.9 in.) from end of telescope makes it easy to use in confined locations. Two-speed focus know (B20) switches between coarse and fine for even faster operation.
 
Quick Collimation
Endless horizontal motion drives can be operated with either hand for fast and easy aiming.
 
Horizontal Angle Measurement
Horizontal angles can be read in 1° or 1gon units. Freely rotatable circle allows any angle reading from zero. Right angles can be quickly set for layout and alignment tasks. The readout window is conveniently located on the instrument base - directly below the eyepiece.
 
Stadia
The stadia lines on the reticle allow distance measurements. Simply multiply the staff length between the top and bottom stadia lines by 100.
 
Model 

B20

B30/BT-30A

B40/BT-40A

Telescope
Length

8.46 in. (215mm)

8.46 in. (215mm)

8.46 in. (215mm)

Magnification

32x

28x

24x

Objective Aperture

1.65 in. (42mm)

1.42 in. (36mm)

1.26 in. (32mm)

Resolving Power

3"

3.5"

4"

Field of View
@328ft/100m
1°20'
(7.5ft/2.3m)
1°25'
(8.2ft/2.5m)
1°25'
(8.2ft/2.5m)
Minimum Focus
(from end of telescope) 

7.9 in. (0.2m)

7.9 in. (0.2m)

7.9 in. (0.2m) 

Image 

Erect

Erect

Erect

Recticle Pattern 

Wedge 

Cross Line 

Cross Line 

Stadia Constant 

0

Stadia Ratio 

100 

100 

100 

Focusing Knob 

2-Speed 

1-Speed 

1-Speed 

Sighting Aid 

Peep Sight 

Peep Sight 

Gun Sight 

Lens Hood 

Retractable 

N/A 

N/A 

Accuracy (standard deviation for 1km double run leveling)
Without Micrometer 

0.03 in. (0.7mm)

0.06 in. (1.5mm) 

0.08 in. (2.0mm) 

With Micrometer 

0.02 in. (0.5mm) 

N/A

N/A 

Compensator 
Type 

Pendulum compensator with magnetic damping system 

Setting Accuracy

0.3" 

0.5" 

Working Range 

± 15' 

Circular Level 
Sensitivity 

10'/2mm 

Mirror 

Pentaprism 

Plane Mirror 

Horizontal Circle 
Diameter 

4.1 in. (103mm) 

Graduations 

1°/1gon 

General 
Horizontal Motion Drive 

Clampless, endless, double-sided knobs 

Water Resistance 

IPX6 (IEC 60529:2001) 

Operating Temperature 

-4 to +122°F (-20 to +50°C) 

Size
Width 

5.12 in. (130mm) 

Length

8.46 in. (215mm)

Height

5.51 in. (140mm)

5.31 in. (135mm)

Weight

4.1 lb (1.85kg)

3.7 lb (1.7kg)/3.3 lb (1.5kb)

 

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