CLEVELAND--(BUSINESS WIRE)--Keithley Instruments, Inc. (NYSE:KEI), a world leader in advanced electrical test instruments and systems, today announced that Linda C. Rae, Executive Vice President and Chief Operating Officer, along with Mark J. Plush, Senior Vice President and Chief Financial Officer, will make a presentation to the investment community at the Noble Financial Sixth Annual Equity Conference to be held at the Hard Rock Hotel, in Hollywood, Florida. The presentation will take place on Monday, June 7, 2010, at 12:30 p.m. EDT.