DT wrote:

I wonder if the 1/4" accuracy at 100' scales (e.g., .025" at 10'), or if
it's always 1/4" (full-scale thing). If it's fixed, it would be too
limiting, but scaled would be plenty good enough.

Bob

If it really uses the laser to measure (as opposed to using the laser to aim a
microwave beam like many do), and according to the diagram on the site it does
indeed appear to use the laser: then the accuracy is probably constant, not
proportional over 100 feet.

Yes, it is indeed real laser ranging, no ultrasonic or other low grade
junk. The TLM100 is by far the least expensive laser ranger I know of.
It's affordable for general use vs. it's bigger siblings with longer
ranges. It's also physically smaller than it's siblings which is an
advantage for cave survey use.