[mircemk] shows how to create a simple non-contact proximity sensor using little more than an Arduino Nano board, and a convenient software library intended to measure the value of capacitors.

Diodes’ AH4930Q 3D linear Hall-effect sensor simplifies rotary motion and proximity detection in automotive applications.

If you don't want this feature, you're out of luck: proximity sensors are featured in every generation of iPhone going back to the year of release in 2007, and you can't turn off an iPhone ...

There are many types of sensors for myriad applications ... In a smartphone, a proximity sensor is located by the phone speaker. It turns off the touch detection during a phone call; otherwise ...