Reflective photoelectric switch is also an infrared invisible light product. It is a small photoelectric component that can detect the change of the light intensity it receives. In the early stage, it is used to detect whether the object is sensed. It is composed of an infrared emitting tube and an infrared receiving tube. Its emission wavelength is 780nm-1mm. The transmitter has a calibration lens to focus the light. Receiver, the receiver cable connects this set to a vacuum tube amplifier. The detection object is the transmitter and detector between the slotted switch and the block light path when it enters the gap. When the object approaches the arc extinguishing chamber, a part of the light collected by the receiver reflects from the object to the photoelectric element. It uses the object to shield or reflect the infrared beam, and is gated by the synchronization circuit to detect the presence of the object. The object is not limited to metal, and all objects that can reflect light can be detected.

Reflective photoelectric switch detection methods have relatively fast response, high resolution, high accuracy, peak wavelength λ=mode, high sensitivity, easy to dissipate heat, lead-free, relatively long service life, comply with RoHS standards, and are a new generation of green and environmentally friendly energy sources. There are many measurement parameters, its struct

       Application principle

　　 Infrared is a kind of electromagnetic radiation, its characteristics are equivalent to radio or X-ray. The light wave visible to the human eye is 380nm-780nm, and the long rays with emission wavelengths of 780nm-1mm are called infrared rays. The infrared photoelectric switches produced preferentially use near-infrared rays near the wavelength of visible light.

Infrared photoelectric switch (photoelectric sensor) belongs to the abbreviation of photoelectric proximity switch. It uses the detected object to shield or reflect the infrared beam, and is gated by the synchronization circuit to detect the presence or absence of the object. The object is not limited to metal but can reflect all Light objects can be detected. According to different detection methods, infrared photoelectric switches can be divided into diffuse reflection photoelectric switches, mirror reflection photoelectric switches, through-beam photoelectric switches, slot photoelectric switches, and fiber optic photoelectric switches.

　　 through-beam photoelectric switch

　　 through-beam photoelectric switch (reflective photoelectric switch) includes a transmitter and a receiver that are separated from each other in structure and placed opposite to each other on the optical axis. The light emitted by the transmitter directly enters the receiver. When the detected object passes between the transmitter and the receiver and blocks the light, the photoelectric switch generates a switch signal. When the detection object is opaque, the through-beam photoelectric switch is a reliable detection mode.