The 3M EM Eye Meter consists of a base unit and three separate sensors for electromagnetic interference (EMI), radio frequency (RF) and electrostatic discharge (ESD) detection. The 3M offers a color touch screen display in a hand-held size which logs data on an SD card. The ESD sensor identifies steps in the process where ESD events occur and verifies that ESD control methods are functioning as designed. The ESD sensor also includes an event counter that tracks the number of events above the set threshold and records discharge strength. The EMI sensor detects and measures transient signals, while the RF sensor detects receptions of transmitted signals.