Item Brochure
SDL30/SDL50
Digital Levels
Save Time with Innovative,
Industry-Leading Technologies
2.5-second High-speed Measurement, 20 lux Minimum Brightness, Inverted Staff
Recognition, Wave-and-Read, and the Highest Accuracy in its Class.
2.5 seconds – High-speed Measurement
Aim, focus, and press a key. Height and distance are simultaneously
measured in 2.5 seconds, 20 percent faster than ordinary digital levels.
Consistent Performance in
Diverse Environments
The SDL30/50 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 SDL30/50 consistently
provides reliable measurement results
without downtime. A small ashlight is
enough to illuminate the staff in the dark.
* 20 lux is dened as the minimum brightness with
which human face can be recognized.
Automatic Recognition of
Inverted Staff
The SDL30/50 automatically recognizes
directions of RAB-Code staffs and
displays the results with a minus sign
(-) when the staff is inverted. Height
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 SDL30/50
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 SDL30/50 automatically detects
the least value of staff readings.
Choice of Accuracy
SDL30: 0.4mm (Super-Invar Staff) / 0.6mm (Invar) / 1.0mm (Fiberglass)
SDL50: 0.6mm (Super-Invar Staff) / 0.8mm (Invar) / 1.5mm (Fiberglass)
Choose the digital level and staffs according to the accuracy* you need.
Sokkia offers the top-of-the-line SDL1X model for higher accuracy
of up to 0.2mm.
* 1km double-run leveling
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 is taken, while manual mode allows you to check the
measurement results before recording. Stored data can be exported
using the “Spectrum Link” software.
Telescope
SDL30
32x
Accuracy
SDL30
0.4
mm
SDL50SDL50
4
4
SDL30
SDL30SDL30
Telescope
SDL50
28x
Accuracy
SDL50
0.6
mm
4
SDL50