Following are the advantages of auto level:
1) Operational Comfort: Use of Auto level is free of fatigue, does not cause strain on eyes, nerves etc.
2) High precision : Precision of auto level is about ± 0.5mm to 0.8 mm for one km
3) High speed: Time required for leveling is about half of that required with ordinary level.
4) Freedom from errors: Bubble usually remain in center and image of staff is erect, easy to read
5) Freedom from external influences: No influence of cloud, rain, magnetic field, vibrations, etc. on the levelling work with Auto level.
6) Range of application: Auto can be used for medium and large size project. To establish bench marks accurately.