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Best Lighted Option: Komelon LED Light Tape Measure. Best Auto-Lock: Komelon SL2825 Self-Lock Power Tape. Easiest to Read: FastCap PSSR-16 Standard Reverse Measuring Tape.
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A laser rangefinder, also known as a laser telemeter, is a rangefinder that uses a laser beam to determine the distance to an object. The most common form of laser rangefinder operates on the time of flight principle by sending a laser pulse in a narrow beam towards the object and measuring the time taken by the pulse to be reflected off the ...
A Chesterman tape measure. James Chesterman, a British metalworker, is credited with the invention of the first retractable tape measure in 1821. [6] His design consisted of a spring-loaded cloth strip with marked measurements, housed within a compact case. Building upon his prior design, Chesterman would patent the first steel tape measure. [7]
Length measurement, distance measurement, or range measurement (ranging) all refer to the many ways in which length, distance, or range can be measured.The most commonly used approaches are the rulers, followed by transit-time methods and the interferometer methods based upon the speed of light.
A collimated beam from a laser source is most often used, in which case the technique can be referred to as multiangle laser light scattering (MALLS). The insertion of the word laser was intended to reassure those used to making light scattering measurements with conventional light sources, such as Hg-arc lamps that low-angle measurements could ...