Topcon Electronic Digital Level DL-502 / 503

Model: DL-502 / 503

• One Button Triggers Measurement and Data Storage
• 0.6mm/0.8mm Height Accuracy
• Advanced RAB Code Technology
• Pre-installed Measurement Programs
• Height Difference Measurement
• Inverse Staff Reading for Ceiling Height
• Internal Memory

Category: Digital Levels

IndustriesBuilding Trades, Construction, Geomatics – Surveying, Mining

Simple Button Operation!

After focusing on the staff, just press one button. The DL-503 reads height and distance, and stores data. Digital technology eliminates misreading and reduces operator’s eye fatigue.


“Wave-and-Read” The World’s First Technology

DL-503 tracks the RAB Code staff waved back and forth, and automatically reads the correct height.

The staff reading becomes the minimum when it stands vertically. The DL-503 automatically finds the least value of staff readings.
This world’s first technology allows for error-free readings of waved staffs, while dramatically reducing operator’s eyestrain


High Accuracy! 0.8mm

DL-503: 0.8mm (Invar staff), 1.5mm (fiberglass staff)

Maximum Reliability! Field-proven Compensator

Incorporating field-proven pendulum compensator with magnetic damping system, the DL-503 provides stability you need when working on busy roads or bridges subject to vibrations.

Measures Ceiling Height! Inverse Staff Reading

RAB Code staff can be read in inverse position. This feature dramatically facilitates height measurement of ceilings, tree branches, road signs, bridges, tunnel crowns, and other structures.


Practical measurement Programs! No Need for Calculators

Onboard programs support various measurements such as elevation, height difference, ceiling height, as well as cut/fill and stakeout in horizontal distance.



Calculates elevation of foresight (FS) with reference to the backsight (BS) elevation.
Elevation of turning point (TP) is used for a new backsight, allowing for consecutive leveling.


Cut and Fill

Cut and fill stakeout facilitates slope works. Measurement can be taken with 0.1mm or 1mm (0.001ft. or 0.01ft.) resolutions.


Height Difference

Automatically displays the height difference between backsight (BS) and foresight (FS) in 0.1/1mm (0.001/0.01ft.) unit.


Ceiling Height

Two measurements provide a ceiling height; one with a staff placed on the ground, the other with an inverted staff put onto the ceiling. Elevation of ceiling can also be calculated with reference to the benchmark elevation.


Internal Memory and Easy Data Transfer!

DL-500 stores up to 2,000 measurement data. The “DL-500 TOOL” software transfers data to a computer in CSV format.

  • One Button Triggers Measurement and Data Storage
  • 0.8mm Height Accuracy
  • Advanced RAB Code Technology
  • Pre-installed Measurement Programs
  • Height Difference Measurement
  • Inverse Staff Reading for Ceiling Height
  • Internal Memory

DL-500 Series Specifications DL-502 DL-503
Telescope Magnification 32X 28X
Objective aperture 45mm 36mm
Resolving power 3” 3.5”
Field of view 1°20” 1°20”
Minimum focus 5.0ft. (1.5m) 5.0ft. (1.5m)
Image Erect Erect
Stadia ratio 100 100
Compensator Type Pendulum compensator with magnetic damping system
Working range ±15’ ±15’
Accuracy (standard deviation for 1km double run leveling)
Electronic reading
Invar staff 0.6mm 0.8mm
Fiberglass staff 1.0mm 1.5mm
Optional reading 1.0mm 2.0mm
Measuring range (1.6 to 100m) (1.6 to 100m)
Distance Measurement (D=measuring distance)
D 10m (±10mm) (±10mm)
10m<D 50m ±0.1%×D ±0.1%×D
50m<D ±0.2%×D ±0.2%×D
User Interface
Display 128×32 dot matrix LCD with backlight
Keyboard 8 keys (7 on front panel, 1 on side panel)
Circular level sensitivity 10’/2mm 10’/2mm
Measurement Program Single / Continuous / Average / Elevation / Height difference / Cut & Fill / Stakeout distance
Data Storage
Internal memory  2,000 points  2,000 points
Job Max. 20 jobs Max. 20 jobs
Data output format CSV CSV
Interface RS-232C RS-232C
Water resistance IPX4 (IEC 60529:2001) IPX4 (IEC 60529:2001)
Operating temperature -20°C to 70°C -20°C to 70°C
Storage temperature -40°C to 70°C -40°C to 70°C
Power supply BDC46B (Li-ion battery, 7.2V)
Operating time Approx. 16 hours Approx. 16 hours
Weight (including battery) 2.4kg 2.4kg
Size (D x W x H) 257×158×182mm 257×158×182mm