Extech Contact Tachometer 20,000 RPM – 461891

In stock

This tachometer features 3 different tips for measuring small and large rotating objects. With the ability to spin up to 20,000rpms this meter is great for measuring quickly rotating devices.

Extech Contact Tachometer 20,000 RPM – 461891

Fast and accurate RPM and surface speed measurements


  • Make contact measurements of rotating objects
  • Contact measurements from 0.5 to 19,999rpm plus linear surface speed measures in ft/min or m/min
  • Simply contact rotating object with sensor tip and read
  • Auto ranging with 0.05% accuracy
  • Measure linear surface speeds in ft/min or m/min using three accessory wheels provided
  • Recalls Last/Max/Min values
  • Comes complete with:
    • Cone tip
    • Flat Tip
    • Spare wheel for surface speed measurements
    • Four 1.5V AA batteries
    • Carrying case

A tachometer simply measures the rotational speed of a shaft, wheel, pulley or a motor. This is a simple concept that can be difficult to accomplish, especially in an engine or confined space. Tachometers have developed into highly accurate, compact devices. Tachometers are found in vehicles, generators, motors, bicycles and other rotating devices.

They are vital to the functioning of engines, generators, airplanes and other devices dependant on sustaining a certain rotational speed. Tachometers have traditionally been analog devices displayed by a pointer on a dial but are now migrating toward digital displays which are more accurate and easier to read.

This tachometer features 3 attachments for reading rotation speeds in all different circumstances. Simply make contact with the rotating shaft, device, motor etc. and the fast response will display the speed immediately. This means contact has to be made for a very brief period of time. This meter can spin at 20,000rpm without taking damage, making it great for testing even fast rotations. The 461891 Contact Tachometer User Manual is attached to this page to answer any further questions.


  • Range:
    • 0.5 to 19,999rpm
    • 0.2 to 6560ft/min
    • 0.05 to 1999.9m/min
  • Accuracy: ±(0.05%rdg +1d)
  • Sampling Time: 1sec>6rpm
  • Resolution: 0.1rpm (0.5 to 999.9rpm);1rpm >1000rpm
  • Dimensions: 6.7 x 2.8 x 1.5" (170 x 27 x 37mm)
  • Weight: 9.2oz (260g)

Unit Ship Weight: 1.5 lbs

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