The project describes the construction of a contact-less tachometer by using a 8051 microcontroller and a proximity sensor to be used in counting the revolutions per minute of a rotating shaft. The ...

The Mini Speed Pro - CT50 is a portable, compact tachometer. It can display two parameters simultaneously. The optical tachometer has a measuring range of 0 to 50,000 rpm and a resolution of 1 rpm, ...

It’s often necessary to measure a motor’s rotational speed without any physical contact with the motor or its shaft. Some methods use a mirror attached to the motor’s rotating part to reflect a pulsed ...