E3S-GS30 U-shaped photoelectric switch sensor for object counting

The U-shaped photoelectric switch has a 'U' shaped structure, with an infrared LED (emitter) and a phototransistor or photodiode (receiver) installed on both sides. The infrared beam emitted by the emitter passes through the U-shaped slot to the receiver. When an object enters the U-shaped slot and blocks the light beam, the light intensity received by the receiver changes, causing a change in the internal circuit state and outputting the corresponding switch signal.

1. Extremely easy installation with fixed optical path:
The biggest advantage is that no on-site alignment is required. Since the emitter and receiver are precisely fixed on both sides of the same housing at the factory and permanently aligned, the user only needs to attach the sensor to the device, completely eliminating the hassle of installing and adjusting through-beam switches. The detection optical path (i.e., the width and depth of the groove) is fixed and very stable.
2. High detection accuracy and fast response:
The small light spot is ideal for detecting small objects, edge positions, or marks (such as labels, holes, or teeth). The high response frequency allows it to be used for high-speed counting and rotational speed measurement.
3. Strong anti-interference ability: Similar to through-beam principle, it is only sensitive to its own emitted modulated light, showing strong resistance to ambient light interference.
4. Object detection characteristics: Like through-beam detection, as long as the object is opaque and can block the light path, it can be detected, regardless of color, material, or reflectivity. However, it still cannot reliably detect transparent or semi-transparent objects.
5. Limited detection forms: The object must fit into the U-shaped groove to be detected. It cannot be used for large or irregularly shaped objects. The detection distance (i.e., groove width) is fixed and cannot be adjusted.