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 ...

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.

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

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 ...