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how-does-digital-tape-measure-work-do Measuring Up. So Let's Get To It! Thanks for sharing. Extend the tape from point to point placing the end-clip at the location you want to measure from. Odd Width Dividing. Enter your name or username to comment.

To use a laser tape measure, you place the device on one end of what you want to measure, and then aim the laser beam so that it hits an object at the other end. If there's no wall, pole or anything like that, you can put a target at the spot you want to measure up to.

The process is similar to using a conventional tape measure, except you use a laser beam instead of metal tape. Once you have the laser at the right spot, press the button, and the tape measure calculates the distance and displays it on its screen.

The calculation is done through precision optics and laser physics using the phase-shift method, in which a laser hits an object and compares its reflection with the beam sent out, or using the time-of-flight method in which the time it takes for an optical pulse to reflect back is calculated.

Some laser tape measures let you measure multiple distances and add them together automatically. Laser tape measures are normally quicker to use than conventional ones, and you avoid the inaccuracies that can be caused by a twisted or sagging tape measure. Plus, it's easier to read a digital display of the measurement than to count little lines on a tape measure.

Laser tape measures also eliminate the complications of measuring high ceilings and other hard-to-reach spaces. The nearest line on the blade to the end of the object is the final measurement. Slowly allow the blade to return to the housing. Always ensure that the tang is fully extended when hooked onto an edge. When reading a tape measure, the edge of the object may fall between two lines on the blade. To avoid cutting too short, always round up to the larger measurement. Bending the tape can lead to an estimate instead of an exact measurement.

Instead, sit the base of the tape measure against one side of the object to be measured. Pull the tang out and hold it to the other side of the bookshelf.

Take the reading from the tape and add it to the length of the housing noted on its base to get an accurate reading. This practice also prevents the tape from being bent repeatedly, which causes damage and premature wear. This curve lets the blade be pulled out further without losing stiffness, helping take longer measurements with more accuracy. The dull serrated edge on the end of the tang can also be used as a marker.

The tang also has a small hole in the end, just above the serrated edge, specifically designed to be hooked onto a nail or screw—very helpful when measuring a flat surface and working without a partner. Simply insert a nail or screw to the side of the surface, grab the head of the fastener with the hole of the tang, and pull out the blade to take a quick, accurate measurement.

Insert a nail or screw in the middle of the material to be measured, then hook the tang to the head.

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