UV meters

I recently received a brochure from Art Preservation Services that,
among other quite nifty items, includes a UV meter.  (APS is, btw, run
by Steven Weintraub, so this is probably a pretty good instrument). From
the brochure:

"This small battery operated unit features a a special remote sensor
making it easy to determine the amount of radiation striking the surface
of an object from a single source or a number of different sources.  The
unit can be adjusted to read low, medium and high levels of irradience.
A digital display increases precision and readability. ($560)

                                  ***
                  Conservation DistList Instance 5:20
               Distributed: Thursday, September 19, 1991
                        Message Id: cdl-5-20-001
                                  ***