The ESL-100 series LED stroboscope is designed to measure the speed of rotating or cycling linear motion objects without contact or reflective tape, as well as freeze motion visually. Built with an aluminum housing and the latest technology, it’s compact size, NiMH rechargeable battery and lifetime LED lights make it a perfect choice for use anywhere on the factory floor. Adjustable flash rate for sharp images at high speed. The ESL-100 is ideal for speed, motion and vibration analysis, such as rotating shafts, fans, cams, etc.The ESL-100 series LED stroboscope is designed to measure the speed of rotating or cycling linear motion objects without contact or reflective tape, as well as freeze motion visually. Built with an aluminum housing and the latest technology, it’s compact size, NiMH rechargeable battery and lifetime LED lights make it a perfect choice for use anywhere on the factory floor. Adjustable flash rate for sharp images at high speed. The ESL-100 is ideal for speed, motion and vibration analysis, such as rotating shafts, fans, cams, etc. Adjustable Flash Duration: For most applications standard flash duration works without adjustment. For ultra high rpm or larger objects rotating with high surface speed, ESL-100 features adjustable flash duration. For ultra high speed applications, objects may move during the brief period of a single flash, resulting in a blurred image. By decreasing flash duration, objects have less time to move and the image will appear sharper.