Reliable investigation and observation of possible mechanical defects Determining the speed of rotating machines can be difficult. But the LED stroboscope 820-2 simplifies the process, because you can perform the diagnosis by means of static display without actually stopping the machine or touching a component of the machine on which you are working. Regardless of whether you examine parasitic vibrations, slippage or unwanted distortions, the LED stroboscope 820-2 is the ideal instrument for on-site troubleshooting, the process or product research and for development purposes. Type: Fluke 820-2