An electronic tachometer is a straightforward enough device, in which the light reflections from a white spot on a rotating object are detected and counted over time, measuring the revolutions per … ...

There are many industry solutions designed solely for measuring rotational speed. The T40 now stands out because its new optional speed measurement sensor lets the device measure both torque and ...

Optical sensor for shaft-speed measurement March 2, 2011 The Optipact motion sensors determine rotational or translational velocities of machinery or products in a wide variety of applications.

Objects rotating at high speed are a feature of modern engineering in various fields, and online inspection of them is a critical challenge. A project at China's Jinan University has now developed a ...

Earth’s rotation has been measured many times over — but never like this. In a first, scientists used entangled quantum particles called photons to reveal the rate at which the globe spins.