A Digital Tachometer, often termed an Optical Encoder or simply an Encoder, is a Mechanical-to-Electrical Conversion Device. The Encoder’s Shaft is Rotated and gives an Output Signal, which is Proportional to distance the shaft is rotated through. The output signal may be square, or Sinusoidal Waves, or Provide an Absolute Position. One of the main Benefits a Digital Tachometer has over its Analogue Counterparts is the ability to Provide more precise and steady readings. We some type of item like Digital Tachometer - Non Contact Type | Contact Type | Contact + Non Contact Type and many more