Extech Photo Tachometer and Stroboscope – 461825

SKU: 461825
Product Weight 1.50 Pounds
This meter features both a stroboscope and a photo tachometer in one meter. Measure timing and rpm with one simple tool able to measure rpm up to 99,999rpm.
Sales price $349.99

Extech Photo Tachometer and Stroboscope – 461825

Stroboscope to analyze rotating objects and a tachometer to measure rpm461825-s


  • Unique display where characters reverse direction depending on measurement mode you are in
  • Microprocessor based with quartz crystal oscillator to maintain high accuracy
  • Tachometer memory stores last, max and min readings
  • Performs Tachometer RPM measurement and Stroboscopic speed and motion analysis
  • Stroboscope course and fine flash rate adjustments in three ranges
  • Large 0.4" 5 digit LCD digital display
  • Battery operation brings motion analysis to any location
  • Complete with four 1.5 volt AA batteries, reflective tape and carrying case

A stroboscope is useful in analyzing rotating objects through the use of a strobe light set at a certain frequency. Matching the timing of the strobe to the rotation of a spinning object, or to some fraction of the timing, will cause the rotating object to appear motionless. This is useful for aligning more than one rotation together and is also used for ignition timing for internal combustion engines.

A tachometer is a simple measure of the rpm of a spinning object. This meter features a non-contact photo tachometer method which can measure rpm up to 99,999rpm. This meter uses visible light reflected back from a piece of reflective tape attached to the spinning object. This is an extremely effective and safe method of testing as it requires no contact with a spinning object and can measure extremely high rpm.

This meter is great for analyzing all kinds of spinning objects including shafts, cylinders, motors, wheels and really anything else. Featuring a reversing display depending on the measurement mode to ensure the display is always upright. The 461825 Photo Tachometer and Stroboscope User Manual is attached to this page to answer any additional questions.


  • Photo Range (RPM): 0.5 to 20,000
  • Strobe Range (RPM): 5 to 99,999
  • Accuracy: within (0.1% +2digits)
  • Photo Surface Speed: 0.2 to 6560 ft/min
  • Photo Sampling Time: 1sec > 6 RPM
  • Strobe Sampling Time: 1 Sec ≥ 60 RPM
  • Photo Resolution: 0.1 RPM (<1,000 RPM) 1 RPM ( ≥ 1,000 RPM)
  • Strobe Resolution: 0.1 FPM (<1,000 FPM) 1 FPM (≥1,000 FPM)
  • Power: 4 x 1.5V AA Batteries
  • Dimensions: 8.5 x 2.6 x 1.5" (215 x 65 x 38mm)
  • Weight: 10.6oz (300g)

Unit Ship Weight: 1.5 lbs



There are yet no reviews for this product.