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Theodolites

DADI DE2A-GF | 1.5km Ultra-Long Range Electronic Theodolite

Product Overview

The DE2A-GF500 is a professional-grade electronic theodolite specifically optimized for ultra-long-distance calibration. Leveraging its advanced coaxial green laser pointing technology, it projects a highly visible and precise laser target over extensive ranges, making it the ideal solution for large-scale engineering structures, high-rise alignments, and precise spatial calibration.

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Key Advantages

  • 1.5km Ultra-Long Distance Pointing

    Equipped with a specially optimized high-power coaxial green laser, ensuring excellent visibility and crisp contrast to the naked eye even at an extreme distance of 1500 meters.

  • Extreme Laser Spot Compression

    A precision optical system compresses the laser spot to ≤ 10mm at 500m, and keeps it under 30mm even at 1500m, ensuring absolute pinpoint accuracy for calibration tasks.

  • 2" High-Precision Angular System

    Utilizes a mature absolute encoder setup providing a stable 2-arcsecond angle measurement accuracy, making long-range target readings exceptionally reliable.

  • Single-Axis Liquid-Electric Compensation

    An embedded high-sensitivity tilt sensor auto-compensates for shifts within a ±3' window, effectively nullifying environmental vibrations and unstable ground conditions.

  • 30x Optical Magnification

    Outfitted with a 30x erect-image telescope and a generous 47mm objective lens aperture to render ultra-sharp target details over extended baselines.

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Technical Specifications

Angle Measurement
Angular Accuracy2" (0.6 mgon)
Reading SystemAbsolute Encoder
Minimum Display Increment1.0" (0.2 mgon)
Angle UnitsDEG / MIL / GON / V%
Circle Diameter74 mm (2.9 in)
Laser Pointer
Laser TypeCoaxial Green Laser
Spot Size @ 500m≤ 10 mm
Spot Size @ 1500m< 30 mm
Internal PlummetClass 2 Laser (1.5mm @ 1.5m)
Telescope
Magnification30x
Effective Objective Aperture47 mm
Image / Field of ViewErect / 1°30'
Minimum Focusing Distance1.5 m
General & Physical
Main Unit Weight4.1 kg
Dimensions (W × D × H)180 × 166 × 355 mm
Compensator / RangeSingle-Axis Liquid-Electric / ±3'
Plate Vial Sensitivity30" / 2 mm
Circular Vial Sensitivity8' / 2 mm
Industrial BuildAll-weather rugged compact body with backlit LCD screen

Applications & Packing List

What are the typical industry application scenarios?

The instrument excels in high-rise structural verticality measurements, large-scale utility tower installations, and extreme long-baseline infrastructure targeting where beam dispersion must be critically limited.

What is included in the standard shipping configuration?

The standard package includes:    
• DE2A-GF500 Green Laser Theodolite Main Unit                 
• High-Durability Engineering Carrying Case (1.7kg)         
• Dedicated Rechargeable Battery (0.2kg)          
• Charging Dock and Operational Manual

What's in the Box

DE3A Digital Electronic Theodolite (2-Second)

Hard Carrying Case

Soft Nylon Key Brush

Toolkit with Cleaning Cloth (For Lens), Screwdriver and 1 Needle

NiMH Rechargeable Battery Pack

5 AA Alkaline Battery Holder

Battery Charger

User Manual


Surveying accessories

Tripod

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Staff

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Prism

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Triple
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