- Model LDT-05 Series - Digital Theodolite



The LDT-05 digital electronic theodolite is designed for enhanced performance in construction applications. Work faster with the advanced features of the LDT-05 to improve productivity while increasing the bottom line.

Fast set-up and easy to use
The advanced features of the LDT-05 make set-up fast and very easy. The intuitive on-board functions allow most anyone to use this great tool, even those with minimal experience!
Economical and affordable
The LDT-05 is attractively priced to fit everyone’s budget.

- Automatic vertical compensation: A tilt warning occurs if out of compensation range, preventing costly errors
- Visible laser plummet :Makes setting over a point a snap — much faster & easier than optical plummets
- 5-second accuracy: High accuracy for tight tolerances
- Precision dual LCD panels with large, easy-to-read numbers: Observe display and functions from both sides of the instrument
- Vertical angle measuring includes percent of grade option: Percent of grade or degrees — your choice!
- Auto Power-Off Option: If enabled, shuts off unit in 30 minutes if no activity to conserve power
- Audible 90 degree ‘beep’: Emits an audible tone at for each of the four right-angle directions for faster orientation
- Zero resetting: Instantly resets the horizontal angle to zero
- The LDT-05 includes both rechargeable and alkaline battery options: Power is always available
- One-year warranty: Our warranty provides you with peace of mind for a full 12 months


  • Image: Erect
  • Magnification: 30x
  • Diameter of Objective Lens (Aperture): 1.7 in (45 mm)
  • Focus Distance: 4.43 ft (1.35 m) to infinity
  • Field of View: 1 degree 30 minutes
  • Ratio of Stadia Lines: 1/100
  • Resolving Power: 3 seconds
  • Reticule Illumination: Yes, on/off button
  • Quick Sites (Rough Sites): Yes

Angle Measurement

  • Minimum Reading: 1 second, 5 second, or 10 second
  • Unit of Reading/Measure: Degree / mil / gon / V%
  • Display: Dual back-lit LCD
  • Accuracy: 5 second
  • Measuring Method/Reading System: Incremental photoelectricity
  • Detection Method: Horizontal both sides, vertical single side


  • Plate/Tubular Bubble Vial: 30 seconds/2 mm
  • Circular Bubble Vial: 8 minutes/2 mm


  • Weight: 10.14 lbs (4.6 kg)
  • Warranty: 1 year
  • Dimensions: 6.4 x 6.1 x 13.4 in. (164 x 154 x 340 mm)
  • Protection Class: IP54
  • Tripod Thread: 5/8 x 11
  • Auto Shut Off: After 30 minutes
  • Tribrach: Detachable


  • Power Source: NiMH rechargeable, option for 4 AA alkaline batteries
  • Battery Life: Alkaline - up to 36 hours
  • Battery Life Alert Visible alert
  • Voltage: 4.8


  • 90-Degree Layout: Yes
  • Checking Angles: Yes
  • Alignment and Plumb: Yes
  • Short-Range Leveling: Yes
  • General Construction: Yes
  • Anchor Bolt Positioning: Yes
  • Steel Column Placement: Yes
  • Setting Elevations: Yes
  • Setting Lines: Yes
  • Basic Grade Work: Yes

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