There are three main types of proximity sensors used in industrial automation — inductive, capacitive, and photoelectric proximity sensors. Each type detects objects without physical contact but works on a different sensing principle depending on the target material and application. Omron proximity sensors are available in all three types, designed for accuracy, long life, and stable performance in various environments.
The inductive proximity sensor is used to detect metal objects. It works by generating an electromagnetic field, and when a metal object enters that field, the sensor detects it instantly. These are ideal for machine automation, position sensing, and metal part detection. The capacitive proximity sensor can detect both metal and non-metal materials such as plastic, glass, wood, or liquids. It operates based on changes in capacitance caused by nearby objects and is commonly used in packaging, material handling, and level detection applications. The photoelectric proximity sensor uses a light beam (infrared or visible) to detect objects, making it suitable for detecting almost any material — even transparent ones — at longer distances. Together, these three types of Omron proximity sensors cover a wide range of industrial uses, offering reliable and precise sensing solutions for modern automation systems.