How do engineers measure the flow of water inside a pipe without opening it? Using Faraday’s law of induction, magnetic flow meters detect tiny voltages created when conductive liquids move through a ...

Physics gives us the basic tools needed to understand the universe, but turning theory into something useful is how engineers make their living. Pushing on that boundary is the subject of this week’s ...

Back when I was a kid, we had these things called compasses. It's just a magnetic needle inside a case that is free to rotate. Since a magnetic field can exert a torque on another magnet, this needle ...

Recent advances in flow sensing have resulted in more accurate, durable, and economical meters. Increasingly important is the ability to interface meters with a computer for instantaneous flow readout ...