Želatinové plátky

This pocket-sized compact photo tachometer measures the RPM (revolutions per minute) of rotating objects without contact. Hand-held tachometer PH-100A for contact measurement of revolution of engines or shafts as well as surface speed and length. Accurate speed readings with programmable input count for all sensor types. Gasoline engine tachometers. A slim and handy pocket-size tachometer. […]