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Photoelectric Sensors

Photoelectric Sensors

What Is a Photoelectric Sensor?

What Is a Photoelectric Sensor?

A photoelectric sensor is an electronic device that detects the presence, position, color, or other characteristics of an object by sensing changes in light. It typically consists of a transmitter that emits a light beam and a receiver that detects the reflected or transmitted light.

When an object enters the light beam, it either blocks or reflects part of the light, causing a change in the amount of light reaching the receiver. The sensor detects this change and converts it into an electrical signal. These electrical signals can be further processed to control other devices or systems.
Photoelectric sensors feature high sensitivity, non-contact detection, and fast response speeds, making them widely used in industrial automation, logistics, packaging, and other fields.
Photoelectric Sensor Detecting the presence of parts
Detecting the presence of parts

Photoelectric Sensor Detecting the presence of packaging bottles
Detecting the presence of packaging bottles

Photoelectric Sensor Detecting the positioning of packaging
Detecting the positioning of packaging

Sensing Modes

Different applications require various sensing methods. To meet these diverse needs, DADISICK offers multiple sensing modes, including through-beam, retro-reflective, and diffuse-reflective sensors. The choice of sensing mode depends on factors such as detection range, the physical composition of the target object, and the sensor's working environment.

Through-beam Sensors

Working Principle:
Through-beam sensors consist of a separate transmitter and receiver. The transmitter emits a beam of light directly to the receiver. When a target object blocks the beam, the sensor detects the interruption and triggers an output signal.

Advantages:
▪️Long detection range, often extending several meters or more.
▪️High accuracy in detecting small objects.
▪️Minimal interference from background light and environmental factors.

Applications:
Ideal for scenarios requiring long-distance detection or high-precision object detection, such as object counting and safety monitoring.
Through-beam Sensors
Retro-reflective Sensors

Retro-reflective Sensors

Working Principle:
Retro-reflective sensors integrate the transmitter and receiver into a single unit. A reflector is used to send the light beam back to the receiver. When an object enters the light path, it interrupts the reflected signal, and the sensor triggers an output signal.

Advantages:
▪️Simple installation with only one reflector required.
▪️Moderate detection range, typically within a few meters.

Considerations:
The reflector should be cleaned regularly to ensure signal stability.

Applications:
Suitable for medium-range object detection, such as product inspection on packaging conveyor lines.

Diffuse-reflective Sensors

Working Principle:
Diffuse-reflective sensors also integrate the transmitter and receiver into a single unit. The sensor detects light reflected off the surface of the target object. The intensity of the reflected light depends on the surface properties of the object. When the received light exceeds a set threshold, the sensor triggers an output signal.

Advantages:
▪️No reflector required, making installation more convenient.
▪️Compatible with various target objects without needing alignment with a specific reflective point.

Limitations:
▪️Short detection range.
▪️Low surface reflectivity of some objects may affect detection performance.

Applications:
Ideal for short-range detection tasks, such as part positioning and sorting on production lines.
Diffuse-reflective Sensors
DADISICK photoelectric sensor is a sensor that uses photoelectric elements as detection elements and can detect the presence or change of light. This is its sensing function. It detects light signals by converting changes in light signals into changes in electrical signals. 1. In automated production lines, it can be used to detect the position, speed and presence of objects, thereby controlling the movement of equipment such as robotic arms and conveyor belts to ensure a smooth and efficient production process. 2. In the metal processing industry, it can be used to detect tiny objects such as metal chips and fragments to ensure the cleanliness and safety of the production process. 3. It can be used for security applications such as intrusion detection and object tracking. When abnormal objects or personnel are detected, the alarm system can be triggered to ensure on-site safety. 4. In the manufacturing and testing process of electronic equipment, it can be used to detect the position and integrity of components such as circuit boards and connectors to ensure the quality and performance of communication equipment.
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Photoelectric Sensors

ModelDescription
Photoelectric Sensors Retro-reflective Sensors GM18 SeriesPhotoelectric Sensors Retro-reflective Sensors GM18 SeriesGM18 Series | GM18-200, GM18-300Detection range: 2000 mm, 3000 mm
Material: Nickel-copper alloy
Connection type: 3pin/4pin with 2M cable
Photoelectric Sensors Through-beam Sensors GM18 SeriesPhotoelectric Sensors Through-beam Sensors GM18 SeriesGM18 Series | GM18-500, GM18-1500Detection range: 5000 mm, 15000 mm
Material: Nickel-copper alloy
Connection type: 3pin/4pin with 2M cable
Photoelectric Sensors Diffuse GM12 SeriesPhotoelectric Sensors Diffuse GM12 SeriesGM12 SeriesDetection range: 20-100 mm,20-200mm, 20-300mm
Material: Nickel-copper alloy
Connection type: 3pin/4pin with 2M cable
Photoelectric Ultra-small Laser Sensor GFS SeriesPhotoelectric Ultra-small Laser Sensor GFS SeriesGFS SeriesDetection range: 2-50mm
Detection range: 2000mm
Casing material: SUS316L
Connection type: Wire lead type (standard wire length 2m)
Photoelectric Sensors Diffuse Reflection GM18 SeriesPhotoelectric Sensors Diffuse Reflection GM18 SeriesGM18 SeriesDetection range: 30-300mm
Detection range: 50-500mm
Detection range: 80-1000mm
Material: Nickel-copper alloy
Connection type: 3pin/4pin with 2M cable
Photoelectric Sensors Through-beam GM12 SeriesPhotoelectric Sensors Through-beam GM12 SeriesGM12 SeriesDetection range: 2000 mm, 5000 mm
Material: Nickel-copper alloy
Connection type: 3pin/4pin with 2M cable

Photoelectric Sensors FAQ


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