Laser Proximity Sensors use laser beams to detect the presence or absence of objects within a certain range. They are used in security systems, robotics, automation, and industrial processes, where ...

Your smoke alarm’s chirp can be oddly reassuring, a small sound that suggests everything is still working. Yet the device ...

Radar detectors are no longer the unreliable dashboard devices they used to be. If you’re concerned about being detected speeding, you can enjoy the benefits of surprisingly advanced systems from ...

This circuit is a laser alarm system like the one we see in various movies. It uses a laser pointer beam to secure your valuables and property. Essentially, when the beam gets interrupted by a person, ...

When you see the phrase “nuisance alarm resistant” on a smoke alarm box, you are being promised a device that can tell the ...

Editor's Note Dec. 31, 2025: We combed through this article to ensure all of our product recommendations are in stock. The Google Nest Protect seems to no longer be available, so we removed it from ...

Q: I wanted to add window sensors to my home for extra peace of mind, and I thought it would be a simple task of searching for “window sensors for security” or “alarms for windows in house.” But it ...