| Model | EL1528 | EL0728 | |
| Standard deviation for 1km double-run leveling | Electronic reading | 1.5mm | 0.7mm |
| Optics reading | 2 | 1 | |
| Electronic reading system | Measurement distance | 2.0m-105m | |
| single measurement time | <2' | ||
| minimum of light intensity | 20Lux | ||
| Display | Minimum distance display value | 1mm | |
| Minimum elevation display value | 0.1mm | ||
| Telescope | Mangnification | 28X | |
| Objective aperture | 40mm | ||
| Shortest sighting distance | 0.5m | ||
| Compensation | range | 15 | |
| Accuracy | 0.5 | ||
| Time | 2' | ||
| Data and interface | interface | RS232 | |
| storage | 2000 date | ||
| Power | battery | 4XAA battery and charger | |
| Continuous-time | 10 hours | ||
| working time | 24 hours | ||
| Others | water proof | IP55 | |
| working temperture | -10°c - +50°c | ||
| weight | <2.5kg | ||
| Angle measurement | 360° | ||