1. Slotted photoelectric sensor
A light transmitter and a receiver are mounted face to face on either side of a slot is a fork photoelectric. The luminaire announces infrared or visible light, and the light receiver receives the light unobstructed. However, when the detected object passes through the trough, the light is blocked, and the photoelectric switch is activated. Output a switch control signal to block or turn on the load current, and then complete a control action. The detection interval of the slot switch is generally only a few centimeters because it is limited by the overall structure.
2. Thru-beam photoelectric sensor
By separating the luminaire from the receiver, the detection interval can be increased. The photoelectric switch composed of a light emitter and a light receiver is called a through-beam split photoelectric switch, referred to as a through-beam photoelectric switch. Its detection interval can be several meters or even tens of meters. When using, the luminaire and the receiver are installed separately on both sides of the path of the detector, and the detector blocks the optical path during the passage, and the receiver outputs a switch control signal on the action.
3. Reflector type photoelectric switch
The reflector and the receiver are installed in the same device, a reflector is installed in front of it, and the photoelectric control function is completed by using the reflection principle, which is called the reflector reflection (or mirror reflection type) photoelectric switch. Under normal conditions, the light announced by the luminaire is reflected back by the reflector and received by the receiver; Once the optical path is blocked by the detector and the receiver cannot receive light, the photoelectric switch will act and output a switch control signal.
4. Diffusion reflection photoelectric switch
It also has a light emitter and a light collector in the detection head, but there is no reflector on the front. Under normal conditions, the luminaire announces that the light receiver cannot be found. When the detected object blocks the light and partially reflects the light back, the receiver receives the light signal and outputs a switching signal.
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Proximity Switches:
NBB2-12GM50-E2 NBB2-12GM50-E0 NBN4-12GM50-E2
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