Photoelectric Sensors for Industrial Automation | Reliable Detection

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Photoelectric Sensor: Optical-to-Electrical Signal Converter for Object Detection

Photoelectric Sensor: Optical-to-Electrical Signal Converter for Object Detection

The photoelectric sensor uses the photoelectric effect to convert light signals into electrical signals, detecting object presence, position, shape, or color. It consists of a transmitter (emitting light) and a receiver (detecting reflected/scattered light), suitable for non-contact detection in automated production lines, logistics sorting, and security systems. Applications include counting objects, detecting transparent materials, or monitoring conveyor belt positions, enhancing automation efficiency and precision.
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Advantages

Non-Contact Sensing Technology

Detects objects without physical contact, eliminating wear and tear, suitable for fragile or high-speed moving items (e.g., glass, electronic components).

Multiple Sensing Modes

Provides opposed (through-beam), retroreflective, and diffused (proximity) modes for diverse applications (e.g., transparency detection, color contrast).

High Immunity to Ambient Light

Uses modulated infrared light to filter out sunlight and fluorescent light interference, ensuring stable operation in harsh lighting conditions.

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In advanced diffuse sensors, background suppression technology enables the sensor to disregard features beyond the range of interest while retaining accuracy on the features of interest. It determines phase shifts of reflected light to mask background sufficiently for accurate distance determining interference, which becomes the primary support for pick and place robots and packaging machines. With ranges of up to 500mm, the sensor is able to achieve accurate results even on highly reflective or dark materials.

Frequently Asked Questions

How does a photoelectric sensor detect objects without contact?

A photoelectric sensor uses the photoelectric effect, with a transmitter emitting light and a receiver detecting reflected or transmitted light. This non-contact technology eliminates wear and tear, making it suitable for fragile or high-speed moving items like glass or electronic components.
The photoelectric sensor offers an adjustable detection range from 0 to 50 meters, adapting to wide conveyor belts or large-scale equipment. This flexibility allows use in both short-range proximity sensing and long-range object detection scenarios.
The photoelectric sensor offers three primary sensing modes: opposed (through-beam), retroreflective, and diffused (proximity).
The photoelectric sensor uses modulated infrared light to filter out interference from sunlight or fluorescent lighting, ensuring stable detection in harsh lighting conditions. This high immunity to ambient light makes it reliable for outdoor or brightly lit industrial environments.
With an IP67 protection grade, the photoelectric sensor features a fully sealed housing that resists water jets and dust. This makes it suitable for washdown environments in food processing, packaging, and automotive manufacturing, where frequent cleaning or dusty conditions are common.
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Customer Reviews

Li Wei
High Sensitivity for Transparent Objects

"In our glass manufacturing line, detecting transparent sheets was a challenge until we switched to these photoelectric sensors. The opposed mode works flawlessly, even with ultra-thin glass (0.5mm), by sensing the slightest interruption in the light beam. The adjustable sensitivity dial lets us fine-tune for different glass textures, and the IP67 rating protects them from the high-moisture environment near our cooling stations. No more missed detections—critical for our quality control."

Emily Johnson
Reliable Photoelectric Sensor for Diverse Applications

We've used this photoelectric sensor in multiple projects, and it never disappoints. It effectively converts light signals to electrical signals with fast response time. The durable design withstands harsh conditions, making it suitable for various industries. A trustworthy choice for precise detection tasks.

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spring limit switch
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push button limit switch
micro limit switch with roller
IP67 Protection Grade

IP67 Protection Grade

Fully sealed housing resists water jets and dust, suitable for washdown environments in food processing, packaging, and automotive manufacturing.
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