Has anybody tried one of these things - any use? Am thinking of this
one, basically for measuring room sizes:
On 7 Jun 2004 01:20:31 -0700, email@example.com (Lobster)
It doesn't give the principle of operation but it appears to be
These aren't bad at accuracy under ideal conditions - i.e. at a
distance from a flat surface with nothing else around. The problem is
that that is seldom the situation and reflections confuse the
If you were an estate agent wanting to do rough room measurements
quickly, then fine, but not much good for accurate measuring for DIY
To email, substitute .nospam with .gl
If you want to measure seriously, you'd be better off with a laser "Disto" -
accurate to 3mm or better, and you can see where the beam is going. But it's
10x your price.
I bought a stanley ultrasonic, but it was appalling to use and accuracy was
rubbish. I realised that I couldn't afford something good. For the fun of
having one and quick rough measures I bought an ultrasonic from Maplins, it
was about thirty quid and is reasonably accurate in an estimating way. But
if I need anything really accurate I use a tape.
I confess I haven't bothered to follow your links as I tend to read this
ng off line but I recently bought an electronic tape measure from
axminster which worked on the ultra sonic principle (Be warned there are
'Laser' tape measures out there which use a laser beam to setablish a
reference point but actually function via ultra sonics)
Basically, IMHO, the ultrasonic ones are fairly useless unless you are
measuring totally empty rooms. The sound bounces off any and every thing
which gives spurious readings.
I sent the one I got back to Axminster and bought a Leica laser version.
Expensive but I have a commercial use for it and the ability to measure
up a job single handed and work to reliable measurements can save us a
lot of money.
Paul Mc Cann
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