The very simplest magnetic sensors are reed switches. These are basically relays with no coil. Instead of a coil, an external magnet gets close enough to make or break the contacts in the reed.

21 thoughts on “ Shine On You Crazy Diamond Quantum Magnetic Sensor ” Esaki says: April 15, 2025 at 4:33 am Is this similar action to a tunnel diode? Report comment. Reply.

Most magnetic sensors operate by detecting how a magnetic field alters the path of an electron. Conventional sensors lose this capability when subjected to temperatures reaching hundreds of degrees.

Self-powered sensor automatically harvests magnetic energy A system designed at MIT could allow sensors to operate in remote settings, without batteries. Date: January 18, 2024 Source: ...

But there is a problem. The body’s magnetic field is tiny, and detecting it requires hugely sensitive sensors. The only commercially available gadgets that can do this job are superconducting ...

In this video, WashU’s Kater Murch describes how his team leveraged “hindsight,” a property of entangled quantum sensors, to make time-traveling detectors.

Operating a magnetic stud finder is easy: Run the device across the wall in a zigzag pattern until the sensor sticks to the wall, indicating a screw or nail under the surface.

Jan 18, 2024: Self-powered sensor automatically harvests magnetic energy (Nanowerk News) MIT researchers have developed a battery-free, self-powered sensor that can harvest energy from its environment ...