30-second answer: The DADI DE2A is a 2" digital theodolite for construction and surveying applications. It uses an absolute encoder, a 30x telescope, dual LCD displays and a single-axis liquid-electric tilt sensor with a ±3' compensation range. The main unit weighs 4.1 kg and includes an internal Class 2 laser plummet.
What Is the DADI DE2A Digital Theodolite?
The DADI DE2A is a digital theodolite designed for construction and surveying work that requires reliable angular measurement. Its absolute encoder system provides 2" (0.6 mgon) angular accuracy, while dual LCD screens and a 10-key interface support straightforward field operation.
What Are the Main Features of the DE2A?
The angle-measurement system is specified at 2" (0.6 mgon) accuracy.
The absolute reading system supports stable angular position measurement without constant zero-resetting.
The telescope provides 30x magnification, a 47 mm objective and a 1°30' field of view.
Dual-sided LCD screens and a 10-key interface provide access to field measurement functions from either side of the instrument.
Liquid-electric detection provides single-axis compensation over a ±3' range.
The main unit weighs 4.1 kg (9.0 lb) for easier transport and handling in field work.
What Is the DE2A Used For?
The DE2A is designed for construction and surveying applications that require horizontal and vertical angle measurement. Its absolute encoder, compensated tilt sensing, optical telescope and internal laser plummet form a practical configuration for professional field measurement.
Who Is the DE2A a Good Fit For?
The DE2A is suited to users who need a conventional digital theodolite with 2" angular accuracy, an absolute encoder, 30x optics, dual displays and single-axis compensation without the distance-measurement functions of a total station.
Technical Specifications
| Angle Measurement | |
| Accuracy | 2" (0.6 mgon) |
| Reading System | Absolute Encoder |
| Measurement Units | DEG / MIL / GON / V% |
| Minimum Reading | 1" / 5" / 10" |
| Circle Diameter | 74 mm (2.9 in) |
| Telescope Optics | |
| Tube Length | 120.4 mm (4.7 in) |
| Image / Magnification | Erect / 30x |
| Field of View | 1°30' |
| Resolving Power | 3" (Standard) |
| Objective Diameter | 47 mm (1.85 in) |
| Minimum Focusing Distance | 1.5 m (4.9 ft) |
| Reticle / Stadia Ratio | Crosshair / 100:0 |
| Tilt Sensor and Leveling | |
| Type / Method | Single-axis / Liquid-electric detection |
| Compensation Range | ±3' |
| Circular Level Sensitivity | Tribrach: 10'/2 mm / Body: 8'/2 mm |
| Tubular Level Sensitivity | 30" / 2 mm |
| General Specifications | |
| Laser Plummet (Internal) | Class 2 Laser (1.5 mm @ 1.5 m) |
| Optical Plummet (Customized) | 3x Magnification |
| Tangent Clamps | Yes |
| Dimensions (W x D x H) | 180 x 166 x 355 mm |
| Main Unit Weight | 4.1 kg (9.0 lb) |
| Battery / Case Weight | 0.2 kg / 1.7 kg |
Standard Package
The standard package includes the DADI DE2A Digital Theodolite, hard carrying case, rechargeable battery pack, battery charger, toolkit and user manual.
Optional Accessories
Available accessories listed in the DE2A data sheet include a heavy-duty tripod, leveling staff and ranging rod, survey hammer and plumb bob, 100 ft measuring tape and optical plummet kit.
Frequently Asked Questions
What is the angular accuracy of the DE2A?
The DE2A is specified at 2" (0.6 mgon) angular accuracy.
Does the DE2A use an absolute encoder?
Yes. The DE2A uses an absolute encoder angle-reading system.
What telescope magnification does the DE2A provide?
The telescope provides 30x magnification with a 47 mm effective objective diameter.
What type of tilt compensation does the DE2A use?
It uses a single-axis liquid-electric tilt sensor with a ±3' compensation range.
Does the DE2A include a laser plummet?
Yes. The standard internal plummet is a Class 2 laser specified at 1.5 mm at 1.5 m. A 3x optical plummet is listed as a customized option.
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