Level Instrument Information
A wooden or metallic block containing a small glass tube with alcohol or similar liquid and an air bubble. As the block is rotated past its intended resting position, the bubble moves, indicating something out of level.

Common Uses
- Indicating whether a surface is level or plumb.
Common Types
- Bubble
- Digital
- Electronic
- Laser
- Transit
Measurement Parameter
- Angle (Degrees, minutes, seconds)
Calibration Discipline
Calibration Equipment Used
- Gage Blocks