PRODUCT DETAILS
LDT-402E Electronic Theodolite Description:
The LDT-402E Electronic Theodolite features an absolute coding angle measuring system that delivers 1"/5" minimum reading with 2" accuracy, ensuring precise and reliable angle measurement for all your surveying projects.
Featuring a dual-sided LCD panel with LED backlight, the LDT-402E Electronic Theodolite provides clear reading from any angle, making it ideal for both day and night operation in various working conditions.
Built with a steel shaft system and metal casing, the LDT-402E Electronic Theodolite offers exceptional durability and long service life, capable of withstanding harsh job site environments from -20℃ to +50℃.
Equipped with an independent tilt sensor, the LDT-402E Electronic Theodolite automatically corrects tilt errors within ±3' range, ensuring measurement accuracy even on uneven terrain.
The LDT-402E Electronic Theodolite comes with a built-in laser plummet (1mm accuracy at 1.5m) and sealed waterproof telescope, providing reliable performance in various weather conditions and challenging environments.
With RS232C data output and 1000-point memory capacity, the LDT-402E Electronic Theodolite enables seamless data transfer and efficient project management for modern surveying workflows.

The LDT-402E Electronic Theodolite includes the following four types:
LDT-402EOL Electronic Theodolite
Theodolite, Bottom: Optical, Top: Laser (Red Beam), Green Shell Color
LDT-402ELO Electronic Theodolite
Theodolite, Bottom: Laser (Red Beam), Top: Optical, Green Shell Color
LDT-402ELL Electronic Theodolite
Theodolite, Bottom: Laser (Red Beam), Top: Laser (Red Beam), Green Shell Color
LDT-402EOO Electronic Theodolite
Theodolite, Bottom: Optical, Top: Optical, Green Shell Color
LDT-402E Electronic Theodolite Specifications
| Model No. | LDT-402E | |
| Tribrach | Model | Detachable |
| Telescope | Imaging | Erect |
| Magnification | 30X | |
| Objective Aperture | 45mm | |
| Resolution | 3" | |
| FOV | 1°30' | |
| Minimum Focus | 1.3m | |
| Multiplication/Additive Constant | 100/ 0 | |
| Length | 156mm | |
| Angle Measurement | Measuring Mode | Absolute Encoder |
| Minimum Reading | 1"/ 5" | |
| Reading Accuracy | 2" | |
| Circle Diameter | 71mm | |
| Angle Units | 360°/ 400gon/ 6400mil | |
| Compensator | Tilt Sensor | Yes |
| Range | ±3' | |
| Laser Plummet | Wave Length | 635nm Red Beam |
| Power | 1mw | |
| Accuracy (1.5m) | 1mm | |
| Laser Grade | ClassⅡ | |
| Optical Plummet (Optional) | Magnification | 3x |
| Field of View | 5° | |
| Focus Range | 0.5m—∞ | |
| Vial | Plate Vial | 30"/ 2mm |
| Circular Vial | 8'/ 2mm | |
| Display | Dual Face | LED Backlight |
| Power | Power Resource | NiMH Battery 4.8V 1500 mAh |
| Working Temperature | -20℃~+50℃ | |
| Output | Data output | RS232C |
| Memory(points) | 1000 | |
