This encased scale sets the WatrLevel apart from other water levels you might have used in the past. Wherever you place the measuring staff you compare that point to the point you originally set to a zero reference. The result is the relative change in elevation between the two points. The WatrLevel is very accurate. These tiny errors are only dependent upon changes in staff elevation and are insignificant for all practical purposes.
Errors occur when water is either drained or added to the bucket.
For more detailed specifications see the Specs . Laser levels and transits rely on degrees of measurement. Furthermore, laser levels and transits can require expensive re-calibration to ensure accuracy. Conversely, the Watrlevel can be used around objects and corners with no degradation in precision. Other advantages of the WatrLevel include its one-person operation, quick set up and very low price.