about Stroboscopes

Stroboscopes are highly stable industrial quality instruments for non-contact RPM measurement as well as for inspection and observation of moving parts.


  1. General Applications
    • RPM measurement
    • Measuring the number of oscillations
    • Detecting slippage
    • Motion analysis by freezing or slowing down actions
  2. Applications
    • Electrical industry
    • Mechanical engineering
    • Automotive industry
    • Textile industry
    • Optical industry
    • Printing and paper industry
    • Ship-building and aircraft
    • Chemical industry
    • Medical industry
    • Mining industry
  3. Principle

    zahnraederIf a periodic flash is aimed at a rapidly rotating or oscillating object at always the same position, the object appears to stand still or to move in slow motion.

  4. RPM Determining

    AnwendungThe true RPM (min-1):
    All stroboscopes give the illusion of stopped motion when flashing in submultiples of the true speed.

    To obtain the correct RPM:
    Turn frequency always from the highest RPM downwards. When the first single image appears, read the true RPM. To verify this, double the flash rate, you then might see 2 images. If the flash rate, however, is below the actual RPM value by 1/even numbers, a freezed motion with only one image will appear.

    Rotation of stroboscopesMeasuring higher RPM than the stroboscope-range using harmonics:
    All instruments can be used also to measure higher RPM by using the images effect:

    • Range up to 20000 min-1
    • Rotating object 40000 min-1
    • Images 2 times seen

    Example for the use of a stroboscope

  5. Phase Shifter

    Phase shift adjustment permits movement of objects to desired position for convenient observation.