I've been looking at laser tape measures to buy and have a question I hope
someone here can answer.

The Black&Decker BDSM100 says that you can measure from either end, but the
package doesn't indicate whether you can use both ends at the same time.
For example, can you put it in the middle of a room and will it be able to
measure the distance between two walls? This would be a really neat
feature.

I suppose you could measure to one wall, rotate the device 180
degrees, measure to the other wall and add the two values. It would be
a neat feature to have a mode that automatically add the values.

BTW, I think these devices are somewhat misleading in their name. As I
understand them they only use the laser beam to give an indication of
what they are measuring to. The actual measurement is done by an
ultrasonic device. This class of device is nowhere near as accurate as
the true laser measuring devices (but then they are much cheaper
also.)



John Keith