Window sensors are a critical part of any home security system. Learn how they work so you can ensure this last line of defense is there when you need it.

How does a wireless home security system work? A wireless home security system uses Wi-Fi to send alerts from its components to your phone.

Then, [Peter] will be able to play around with this sensor and hopefully make a very cheap but very accurate air particle sensor that should be hanging on the wall of your shop.

Professor Danielle George explains how a digital camera’s CMOS sensor captures an image, using balls and buckets to represent photons, electrons and capacitors.

There’s a drivetrain on it! We go over the battery, sensors, and other components that make your electric bicycle go.

But what exactly is continuous glucose monitoring, how does the glucose sensor work, and where should it be placed? Continuous glucose monitoring lets people with diabetes track their blood sugar ...

How does a CGM sensor work? Continuous glucose monitors measure the glucose in your interstitial fluid – a thin layer of fluid which surrounds the body’s cells and provides them with nutrients.

The Sony A7R II has a Back Side Illuminated Sensor. How does this work and why is it better?Here's the run-down on back-side illuminated sensors (like those in the recently announced Sony cameras) ...

The wearable sensor does the same thing, though the current is smaller, he said. The pill is designed to work for only about 3 minutes.