If you're building up your smart home setup, introducing door sensors can be great for security, but they can bring a lot ...

As you can see in the schematic above, this automatic air curtain door sensor switch design uses a common magnetic door switch for automatic on/off of the air curtain. The magnetic door switch ...

You see these a lot in, for example, door alarm sensors. Then again, there’s no real finesse to a reed. It changes state when it sees enough of a magnetic field and that’s about all.

Now, thanks to the work of [Jonathan Armstrong] we have such a firmware for the 433 MHz magnetic door and window sensors that you can pick up on AliExpress for $4 USD a piece.

Nest’s home security system costs $499 and comes with magnetic door sensors. Nest Secure is a modular system for arming your doors and windows.

The Door and Window Sensor P2 comes with an adhesive mount “that will not damage the wall if removed,” says Aqara, and a thin magnetic plate for additional mounting options.

Magnetoresistance ratio enhancement opens door to highly sensitive magnetic field sensors. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2018 / 12 / 181220104648.htm ...

"This sensor could open the door to studying magnetic phenomena in new material systems, or with higher spatial resolution than done before," said Prof Hannah Stern, who co-led the research with ...