A photoelectric sensor is a device that converts optical signals into electrical signals, wiy used in industrial automation, environmental monitoring, smart devices, other fields.
1. Operating Principle Classification
Photoelectric Effect: Signal conversion is achieved based on the external photoelectric effect (e.g., phototubes), internal photoelectric effect (e.g., photoresistors), photovoltaic effect (e.g., photoelectric cells). Operating Modes:
.Through-beam: Triggered by interrupting the light path within the slot, with a short detection range (a few centimeters). .Retro-reflective: The emitter receiver are positioned on opposite sides, enabling detection distances of up to several tens of meters. .Diffuse-reflective: Relies on light reflected from the object, suitable for non-contact detection.
2. Technical Features Advantages
.Non-contact Detection: Eliminates mechanical wear, ideal for high-speed or precision applications. .High Precision Response Speed: For example, photoelectric tachometers offer high resolution strong anti-interference capability. .Modular Design: Some products support fiber-optic housing, adapting to the detection of minute objects.
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