Sokkia Power Level SDL50 Laser Level

Sokkia Power Level SDL50
Sokkia SD

Sokkia Power Level SDL50 Laser Level

2.5 Seconds – High-Speed Measurement
Aim, Focus, and press a key. Height and distance are simultaneously
measure in 2.5 seconds, 20 percent faster than ordinary digital levels.

Consistent Performance in Diverse

The SDL50 provides the superior measurement capability under a variety
of environmental conditions. Even when the staff surface is partially
shaded, or in dim lighting conditions where the brightness at staff
surface is as low as 20 lux, the SDL50 consistently provides reliable
measurement results without downtime. A small flashlight is enough to
illuminate the staff in the dark.

Automatic Recognition of Inverted Staff
The SDL50 automatically recognizes directions of RAB-Code staffs and
displays the result with a minus sign (-) when the staff is inverted.
Heigh of ceiling, overpass, bridge, road sign, tree branch, tunnel
crown, and other objects can be easily measured without a calculator.

Wave-and-Read Technology
The innovative “Wave-and-Read’ Technology provides an additional survey
style option. The SDL50 tracks the RAB-Code staff waved back and forth
to read the correct height. The staff reading becomes the minimum when
it is in vertical position. The SDL50 automatically detects the least
value of staff readings.

Power Level SDL50

Choice of Accuracy
0.6mm (New Super-Invar Staff) / 0.8mm (Invar) / 1.5mm (Fiberglass)

Internal Memory
Up to 2,000 measurement data of elevation or height difference can be
recorded in the internal memory. Auto mode records data as soon as the
measurement results before recording. Stored data can be exported using
the “Spectrum Link” Software.

Convenient Onboard Programs
The onboard measuremnt programs of SDL50 facilitate leveling and
setting-out tasks. Programs include:

  • Elevation
  • Heigh Difference
  • Cut and Fill Setting-out
  • Setting-out in Distance

Sokkia Power Level SDL50 Lasers & Levels


Height Accuracy
(ISO 17123-2)

BIS30A Staff

BIS20/30 Staffs

BGS Staffs

BGS Staffs

0.6mm (0.024in.)
0.8mm (0.03in.)
1.5mm (0.06in.)2.0mm (0.08in.)
Distance Accuracy
(D: Measuring Distance)
Electronic <±10mm (±0.4in.) [D≤10m (D≤33ft.)]
<±0.1% x D [10<D≤50m (33<D≤ 164ft.)
<±0.2% x D [50<D≤100m (164<D≤328ft.)]
Measuring Range Electronic
1.6 to 100m (5.3 to 328ft.)
from 1.5m (5.0ft.)
Measuring Mode Single /
Repeat / Average / Tracking / Wave-and-Read
Display Resolution Height
(0.001/0.01/1ft., 1/8in.)
0.01/0.1m (0.1/1ft., 1in.)
Measuring Time Single / Repeat
<2.5s x [number of measurements]
Minimum brightness condition 20 lux
at the surface of staff (with natural light)
Telescope Objective aperture
Magnification / Resolving Power
Minimum focus / Field of View
36mm (1.4in.)
28x / 3.5″
1.5m (5ft.) / 1°20′
Compensator Type
Working Range
Pendulum compensator with
magnetic damping system
Sensitivity of circular level 10’/2mm
Horizontal Circle Diameter:
103mm (4in.), Graduation: 1° (1gon)
Display Dot
matrix LCD (128 x 32 dot) with illuminator
Keyboard 8 keys
(7 key son front panel, 1 key on side panel)
Data storage 2,000
points internal memory
Interface RS-232C,
Baud rate 1,200 to 38,400bps
Onboard programs Elevation
/ Height difference / Cut & Fill setting-out / Settin-out distance
/ Height measurement
Water Resistance IPX4
Operating Temperature -20 to
+50°C (-4 to 122°F)
Size W158 x
D257 x H182mm
(W6.2 x D10.1 x H7.2in.)
Weight with Battery 2.4kg
Standard Battery BDC46B
(Rechargeable Li-ion, 7.2v, 2.45aH)
Operating Time Approx.
16 hours at 25°C (77°F)

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Sokkia Power Level SDL50 Spec Sheet