Description
- Many Abney levels will feature items such as stadia and will have a feature to focus items at different distances. Some even have a magnification feature. Abney levels are easier to use and inexpensive. They are used to measure degrees, percent of grade and topographic elevation. The user can then determine height, volume and grade through manipulating the readings with trigonometry. : http://www.engineersupply.com/Hand-Levels-and-Abney-Levels-and-Dumpy-Levels.aspx ›See more product details
Circle Diameter : 30mm Measuring Range Angle : +90°~0~-90° (Min. Grad.1°) Incline : +45~0°35'; 1:1~1:100 Vernier Graduation : 10' Plate Vial : 20'/2mm Instrument Size : 130mm(5-1/4")×56mm×29mm
