What is proximity sensor ?
We can say that proximity sensor is a device which detects objects nearby without any physical contact up to nominal range or sensor’s vicinity. In brief we can also say that Sensors which convert information on the movement or presence of an object into an electrical signal are called proximity sensors.
How Proximity Sensors Work?
When anything comes in the range of Proximity sensor it flash out infrared beam and monitors reflections. When sensor senses reflections it confirms that there’s an object nearby.