There are several different types of survey level, though all perform broadly the same task; to define a horizontal line of sight using a telescope . The difference between the types is a factor of cost and accuracy. The Dumpy level is one of the cheapest levels on the market used extensively by builders in the building industry. The most common type of levelling instrument used by Surveyors is the Automatic Level. The most accurate levels on the market today are the digital levels, capable of measuring to a 100th of a mm.. Some features of a level generic to all types of levels:-.

All levels have some method of establishing a line of sight that is perpendicular to the vertical axis.

• Dumpy level
• Tilting level
• Automatic level
• Digital Level