

Features:
• Special design: single horizontal spindle which cross telescope New design concept, combine higher precision, better stable and shock resistance ability.
• Absolute angle encoder system
Able to read angle data without passing “0”, let angle measurement be more simple and convenient.
• English large display
Adopt backlight technology, able to display horizontal and vertical angle at the same time. Convenient to be used in different condition.
• Superior water and dust proof specification IP66
Able to prevent dust and humid air, maintain good performance even in bad environment.
| Specifications: | |
| Model No.: | DT-21 /DT-51 |
| Telescope | |
| Image | Erect |
| Magnification | 30X |
| Objective aperture | 45mm |
| Field of view | 1° 30’ |
| Shortest viewing distance | 1.4m |
| Stadia ratio | 100 |
| Resolution | 3’’ |
| Angle measurement | |
| Angle measurement mode | Absolute angle encoder system |
| Minimum count | 1” / 5” |
| Accuracy | 2” / 5” |
| Angle units | DEG/MIL/GON |
| Display | LCD double sides |
| Compensation range | ± 3’ |
| Plummet | Laser or optical plummet for option |
| Precision of plate vial | 30” / 2mm |
| Precision of circular vial | 8’ / 2mm |
| Working temperature | -20°C ~ 50°C |
| Battery | 3.7V chargeable lithium battery |
| Weight | 4.8kg |
| Standard outfit: | main unit, 1pc rechargeable battery pack and charger, instrument manual, plastic case. |