Proximity Sensors are widely used in industrial and manufacturing applications, especially for safety and inventory management applications. In an automated production line, for example, it is used for object detection, positioning, inspection and counting. It is also used for part detection in an industrial conveyor system. Proximity sensors can also be found in consumer devices. In smartphones, proximity sensors are used to detect if a user is holding their phone near their face. They are also used as capacitive touch switches on consumer electronics products.