Just one upload this week to say hello, I’ve been extra busy these past few days! It seems appropriate to upload a water shot since our basement flooded Wednesday night for the first time in the 13 years we’ve lived here. The remains of Tropical Storm Lee dumped enough rain to cause water to come into our finished basement through any crack it could find! The waters have receded now but it will take days to dry it all out!
Thanks for stopping by my photostream. Best wishes to you all! : )
Explore Sep 10, 2011 #460 Thank you all for your kindness!
Tagged: , Memories by Jules , Julie Wagner , PS Elements 5.0 , Pennsylvania , United States , York County , Nikon D90 , Cute and Fuzzy , baby ducks , NaturesElegantShots , Explore Sep 10, 2011 #460 , FlickrsPortal … Read More
Over 4,000 years ago, the ancient Egyptian version of a level was a string and weight hanging plumb from the center of a frame. And while the modern contractor evolved into using more accurate spirit levels, many are upgrading to higher-tech electronic measuring tools which find "level" with lasers, inclinometers and accelerometers. Although the accuracy differences between traditional levels and laser levels, digital levels or the popular bubble level application on your Droid or I-Phone, are now imperceptible to humans, it's not going to stop the convergence of new technologies into our traditional tools.
Simple as it was, Bronze Age Egyptian level technology worked, but the Industrial Age cave man the ability to use machines to make metal and plastic leveling tools to more exacting standards. In the twenty century, the level was perfected with the spirit vial or bubble vial, with a glass body (now acrylic) and mineral spirit contents. This miniature level, when placed into a wood or metal frame from 9 "to 96" creates a tool for the job site. The accuracy of spirit levels are typically less than or equal to the width of a human hair; an accuracy barely perceptible to humans. On many spirit levels found in stores today, level accuracy is stated as plus or minus 0.0005 inches per inch or 0.5 millimeters per meter. However, level accuracy on the job has always been limited by the ability of the human eye to see when the bubble is in the center of the vial.
Accurate as the Industrial Age spirit level is, the problem of a human's perception of "level" was solved by the Digital Age introduction of the laser level and the digital level.
Laser Level Technology
A quality laser level accuracy is plus or minus 1 / 16th of an inch (0.0625 inches) per 100 feet; 10 times greater than spirit level accuracy of over 1/2 of an inch (0.6 inches) per 100 feet. This level of accuracy, which can not be perceived by the human eye, is achieved through a laser diode, which concentrates the energy created by charged particles into a single beam of light. Enhancing the accuracy further are self-leveling motors located inside the laser that continuously keep the laser beacon on "level". The benefits of using a laser level extend beyond just accuracy; laser levels allow for measuring level across much longer distances and can turn a two-person measuring job into one that can be done alone. Contractors' understanding of laser levels is growing and more and more are using them indoors and outdoors.
Over the last decade, technological improvements have already bought laser level costs down and expanded available features. For the professional user, ten years ago, the super-bright and highly visible green-beam laser levels were only found on high-end lasers which cost several thousand dollars, while today, you can find green lasers for under $ 1,000. On the high-end today, product features include GPS to determine exact positions for surveying and other construction. For the … Read More