Rev Tach™ IV

Rev Tach IV

Set up. Aim & Read.

The Rev Tach optical tachometer – calibration grade optical tachometer to measure aircraft propeller oration speeds

Product Overview

The Rev Tach optical tachometer is designed to be used for measurement of aircraft propeller rotation speeds, up to 300,000 blade passages per minute. Rev Tach is a recognized industry standard rotation speed calibration grade optical tachometer. It utilizes powerful micro-computer resources and state of the art optical detection circuitry.

The instrument is easy to operate – just set up, aim and read – from direct sunlight to near total darkness, in front, back or angled to the propeller, in flight or on the ground.

Rev Tach™ IV

Technical Specs


Passive, narrow beam, ambient light shift detect. Totally CMOS.


8 oz


3.33” W x 5.25” D x 2.05” H


9 volt #1604, 200+ hours operation with recommended Alkaline type


Over 30 ft. distance range


Accurate to +/- 1 RPM. Accuracy equal to resolution specifications.


• NIST accuracy certified


  • Up to 300,000 blade passages / minute
  • 1 RPM to 9,999. 10 RPM to 99,999. 100 RPM from 100,000 over
  • 1 to 10 blades per revolution
  • Direct RPM readings for all scales

Kit Includes

  • One year warranty, parts and labour
  • Ready to go out of the box
  • Kit includes user manual

Industry Application

Civil/Commercial Aviation

Civil/Commercial Aviation

General Aviation

General Aviation