Keithley Creates Measurement How-To Library on CD

FOR IMMEDIATE RELEASE



Cleveland, OH - March 25, 2004 - Keithley Instruments, Inc. (NYSE:KEI), a world leader in advanced electrical test instruments and systems, today announced that it is releasing a tutorial CD containing a collection of its on-line seminars on measurement methods. Keithley's Making Measurements with Confidence CD, which is available free of charge, offers practical and helpful techniques for obtaining the most accurate and precise measurements possible. Keithley produced the CD to enable viewing the seminars without the need for going on-line, as for example on an airplane.

Seminars on the CD include:

• 4 Steps to Precision Measurements
• Ethernet-Based Precision Instrumentation, Introductory Course
• How to Get the Most from Your Low Current Measurements Instruments
• How to Make Accurate Resistance Measurements
• How to Make Sensitive DC Measurements
• Reducing Voltage Noise and Error in Challenging Measurements
• Techniques for Accurate Nanotech Electrical Measurements
• Tips, Tricks, and Traps for Advanced SMU DC Measurements
• Understanding High Accuracy Wireless Measurements
• Understanding Measurement Uncertainty
• Understanding the Basics of Switching Systems

The seminars on the CD are the archived version of the original broadcasts narrated by the Keithley experts. Viewers can obtain the PowerPoint slides that accompany each seminar and other pertinent reference information, such as application notes and white papers, by clicking the 'Learn More' button in each presentation.

The CD is available free of charge at www.keithley.com/pr/002.html.

About Keithley Instruments, Inc.

With more than 50 years of measurement expertise, Keithley Instruments (www.keithley.com) has become a world leader in advanced electrical test instruments and systems from DC to RF (radio frequency) geared to the specialized needs of electronics manufacturers for high performance production testing, process monitoring, product development, and research. By building upon our strength in electrical measurement solutions for research, Keithley has become a production test technology leader for the semiconductor, wireless, optoelectronics, and other precision electronics segments of the worldwide electronics industry. The value we provide to our customers is a combination of precision measurement technology and a rich understanding of their applications to improve the quality, throughput, and yield of their products.