semiconductor, data acquisition, instrumentation, electronics, electrometers, parametric test equipment

Keithley Instruments, Inc. has been designing and manufacturing precision instrumentation since 1946. Today, Keithley is a world leader in providing hardware and software solutions for electronic test and measurement, data acquisition, medical equipment manufacturers and semiconductor characterization.

Keithley Instruments, Inc. is a world leader in precision electrical measuring instruments. The company specializes in equipment that accurately makes extremely low level electrical measurements for research, design engineering,and production test applications in a wide range of electronics industries. Keithley Instruments Common Shares are traded on the NYSE exchange under the symbol KEI.