I bought this to use on a project, but I've changed my approach to the
project - there have been some discussions on this NG about such items, so
here is one with a cheap 99 cent starting price. Here is the link:
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3826984600

so you don't have to follow the link to see what it is, it's a
microprocessor based process control switch - it uses prox sensor (or some
other types) inputs and actuates a relay based on speed setpoints you enter.
It is in a NEMA enclosure. Typically used for overspeed or underspeed
protection, slipping belt detection, and variouis machine control
applications.

I bought it surplus, but it sure looks like it's new. Dated 3-28-01

--
Bill