Stroboscopes remotely measure the speed of moving machinery. You can measure RPMs from a safe distance and limit your risk. If you want to check the performance of difficult-to-reach equipment, use a stroboscope. Many stroboscopes are able to slow down or freeze reciprocating or rotating machinery, so you can visually inspect it. Inspections can save you time and expense by revealing when equipment is operating less efficiently. A stroboscope also can be useful for checking pump operation, propeller performance, gear movements, industrial fan speeds, and oil leaks.