Extech Non-Contact Photo Tachometer – 461893

In stock

This tachometer features a photo measurement method which reflects visible light off from reflective tape attached to the rotating object. This allows for reading up to 99,999rpm.

Extech Non-Contact Photo Tachometer – 461893

Non-contact RPM measurements using visible light, great for extremely high RPM


  • Make non-contact rpm measurements of rotating objects
  • Great for measuring rpm on any part of a rotating object
  • Use reflective marker on object to be measured and point the integral light beam for accurate readings updated every second
  • Non-contact measurements from 5 to 99,999rpm
  • 2 to 6 inches (50 to 150mm) measurement distance (depending on ambient light)
  • Built-in memory recalls last MAX/MIN value stored
  • Auto ranging with 0.05% accuracy
  • Large 5 digit LCD display is easy to read
  • Comes complete with:
    • 23” (0.6m) reflective tape
    • 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. Some models even feature laser or photo reading technology which offers non-contact readings and can be used on extremely fast rotations without worrying about damage or injury.

This meter features that very technology, being able to measure rotations up to 99,999rpm. The added ability to measure on any surface of a rotating object makes this a more convenient meter to use. Great for testing hard to reach or extremely high rpm components. This meter uses visible light as its reading device so it is clear where the meter is pointed.

Simply attach the reflective tape to the component to be measured and turn the device on. The readings are updated every second for a quick and easy measurement and tracking of the rpm. The 461893 Non-Contact Photo Tachometer User Manual is attached to this page to answer any additional questions.


  • Range (rpm): 5 to 99,999
  • Accuracy: ±(0.05%rdg +1d)
  • Sampling Time: 1sec > 60rpm
  • 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: 8.8oz (250g)

Unit Ship Weight: 1.5 lbs

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