The wholesale photoelectric sensor are sensors that convert optical signals into electrical signals based on the photoelectric effect. Due to its fast response speed, non-contact detection and simple structure, the wholesale photoelectric sensor are widely used in detection and control systems.

The so-called photoelectric effect of the wholesale photoelectric sensor means that when an object is irradiated with light, the object is bombarded by a series of photons with energy, so the electrons in the material of the object absorb the energy of the photons and the corresponding electrical effects occur, such as changes in conductivity, emission of electrons or generate electromotive force, etc.
The photoelectric effect of the wholesale photoelectric sensor is usually divided into three categories: First, the phenomenon that electrons can escape from the surface of an object under the action of light is called the external photoelectric effect. Photoelectric elements based on the external photoelectric effect include photoelectric sensor photocells, photomultiplier tubes, and the like. Second, the phenomenon that the resistivity of an object can be changed under the action of light is called the internal photoelectric effect. Third, under the action of light, the phenomenon that an object can generate an electromotive force in a certain direction is called the photovoltaic effect. Such photoelectric components include wholesale photoelectric sensor photocells, phototransistors, and the like.