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.
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.

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.

| Angle Measurement | |
| Angular Accuracy | 2" (0.6 mgon) |
| Reading System | Absolute Encoder |
| Minimum Display Increment | 1.0" (0.2 mgon) |
| Angle Units | DEG / MIL / GON / V% |
| Circle Diameter | 74 mm (2.9 in) |
| Laser Pointer | |
| Laser Type | Coaxial Green Laser |
| Spot Size @ 500m | ≤ 10 mm |
| Spot Size @ 1500m | < 30 mm |
| Internal Plummet | Class 2 Laser (1.5mm @ 1.5m) |
| Telescope | |
| Magnification | 30x |
| Effective Objective Aperture | 47 mm |
| Image / Field of View | Erect / 1°30' |
| Minimum Focusing Distance | 1.5 m |
| General & Physical | |
| Main Unit Weight | 4.1 kg |
| Dimensions (W × D × H) | 180 × 166 × 355 mm |
| Compensator / Range | Single-Axis Liquid-Electric / ±3' |
| Plate Vial Sensitivity | 30" / 2 mm |
| Circular Vial Sensitivity | 8' / 2 mm |
| Industrial Build | All-weather rugged compact body with backlit LCD screen |
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.
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 | J-1A |
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Staff | 3m |
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Prism | AK18-1 |
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| Triple | TPS30-Y | ![]() |




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