Rotating components are basic parts in almost all industrial machinery; examples are generators, turbines, pumps…etc. The objective of this trainer is to teach students measuring the speed of a rotating shaft using different types of speed sensors and comparing between their different behaviors and characteristics. The speed sensors used are: Photoelectric sensor, Electromagnetic Proximity sensor, DC Tachometer Generator, and Magnetic Pickup & Fly Wheel sensor (option). The different sensors are mounted in a position where they can measure the same speed of the rotating shaft; as a result the student will be able to note the differences between them.