Let us look at the history of surveying levels. Since the Dumpy level was invented in early 1700's it has been considered the standard, that was up until around the 1830's when the transit level was invented. Recently the level has changed faster than you can keep up with it, but through all this the Dumpy level has remained a reliable back up just in case the modern levels breakdown.
What Is A Dumpy Level
The Dumpy level was a simple device that was nothing more then a small telescope with a bubble level attached to it. The newer Dumpy levels have a few more bell and whistles but are still the same basic design. Some of the drawbacks of a Dumpy level are the time it takes to set up and get level, the slightest mistake in setting it up can result in an inaccurate reading, and taking more then one measurement from different directions can be off if not set up perfectly.
A Laser Level And How It Works
A laser level is a fairly recent invention, and has changed the way surveying is being done. With a self leveling laser level you can be assured that your measurement will be as accurate as humanly possible. A laser level is a level that uses a laser light to project a line. Most surveying laser levels us a rotating mirror so that they can project a horizontal plane around in a circle. A laser level is more accurate then a Dumpy level but can break down from time to time. |
