The new Ring glass alarm sensor is a cheap peripheral for the company's alarm system that alerts you when a window breaks.

Sold in various sizes, these systems include devices like door and window sensors, motion detectors and keypads, plus alarm sirens, a sensor that responds to breaking glass, and a panic button.

There’s a huge market for 433 MHz alarm system hardware out there, from PIR motion detectors to door and window sensors. If you want to put them to work, all you need is a receiver, a network ...