| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 1 m |
| Light spot geometry | Round |
Retro-reflective photoelectric sensors
Retro-reflective photoelectric sensors are optical sensors for detecting objects in a defined area. They consist of a transmitter and a receiver located on opposite sides of the area.
The transmitter generates a light signal that is directed at the object to be detected. When the light signal is reflected by the object, the receiver picks up the reflected signal. The receiver generates an electrical signal when the reflected signal reaches a certain intensity. The electrical signal is processed by an electronic circuit to detect the presence of the object.
Retro-reflective photoelectric sensors are used in many applications, including industrial, logistics, mechanical engineering and electronics. They can be used to detect the presence of objects on a conveyor belt, to control automated machinery or as part of safety systems.
Modern retro-reflective sensors often use digital displays and can be linked to other systems, such as an automatic control system, to optimise the production process and increase efficiency.
Retro-reflective sensors are an effective and accurate means of detecting the presence of objects in a given area and can be used in many applications.
... Read more
The transmitter generates a light signal that is directed at the object to be detected. When the light signal is reflected by the object, the receiver picks up the reflected signal. The receiver generates an electrical signal when the reflected signal reaches a certain intensity. The electrical signal is processed by an electronic circuit to detect the presence of the object.
Retro-reflective photoelectric sensors are used in many applications, including industrial, logistics, mechanical engineering and electronics. They can be used to detect the presence of objects on a conveyor belt, to control automated machinery or as part of safety systems.
Modern retro-reflective sensors often use digital displays and can be linked to other systems, such as an automatic control system, to optimise the production process and increase efficiency.
Retro-reflective sensors are an effective and accurate means of detecting the presence of objects in a given area and can be used in many applications.
... Read more
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| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 22 m |
| Light spot geometry | Round |
| Switching frequency max. | 25 Hz |
| Switching output | Relay |
| Dimension (width) | 25 mm |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 22 m |
| Light spot geometry | Round |
| Switching frequency max. | 25 Hz |
| Switching output | Relay |
| Dimension (width) | 25 mm |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 22 m |
| Light spot geometry | Round |
| Switching frequency max. | 25 Hz |
| Switching output | Relay |
| Dimension (width) | 25 mm |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 22 m |
| Light spot geometry | Round |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 800 mm |
| Light spot geometry | Round |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 2 m |
| Light spot geometry | Round |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 800 mm |
| Light spot geometry | Round |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 2 m |
| Light spot geometry | Round |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 2.5 m |
| Light spot geometry | Round |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 4 m |
| Light spot geometry | Round |
| Switching frequency max. | 25 Hz |
| Switching output | Relay |
| Operating range | 0 to 4 m |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 2.5 m |
| Light spot geometry | Round |
| Switching frequency max. | 25 Hz |
| Switching output | Relay |
| Operating range | 0 to 4 m |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 3 m |
| Light spot geometry | Round |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 4 m |
| Light spot geometry | Round |
| Response time | 1,000 to 15,000 ms |
| Operating range | 0 to 3 m |
| Light spot geometry | Round |
Triple reflectors (reflector prisms) are made up of three mirrors standing in relation to each other. When light rays hit the triple mirror, they are rotated by 180° and leave the mirror in the same direction. The polarization of the transmitted light is rotated by 90°. Reflective foils do not cause polarization of the transmitted light and are therefore unsuitable for the use of retro-reflective sensors with polarizing filters. Retro-reflective sensors with triple mirrors are easier to align, as they can be arranged at an angle of up to approx. +/- 15 to the emitted light.
When using laser light as a transmitting light, reflections of the strongly bundled laser light can occur at the prism edges of the triple reflector. This can lead to faulty switching. Special accessories from the suppliers can be helpful here.
Reflection light barriers with polarizing filter work with polarized light. This type of retro-reflective sensor is also suitable for detecting shiny and reflective objects. When the polarized transmitted light hits the triple mirror, it is rotated by 90°. The receiver with polarizing filter detects the polarized light. Non-polarized light hitting the receiver is thus not taken into account. Retro-reflective sensors with polarizing filter work mainly with red light diodes. Polarization filters have a strong attenuating effect on the transmitted light and thus reduce the range of the reflex barrier.
Light-switching retro-reflective sensors
If transmitted light falls on the receiver because the target does not interrupt the light beam, the switching function is triggered. Conversely, if the transmitted light does not fall on the receiver because a measuring object interrupts the light beam of the transmitter, switching does not take place. No measuring object in the light beam: the output is not switched There is measuring object in the light beam: the output is switched
Dark switching retro-reflective sensors
If no transmitted light falls on the receiver because the measuring object interrupts the light beam, the switching function is triggered. Conversely, if the transmitted light falls on the receiver because no measuring object interrupts the light beam of the transmitter, the output is not switched. No measuring object in the light beam: the output is switched. With measuring object in the light beam: the output is not switched
When using laser light as a transmitting light, reflections of the strongly bundled laser light can occur at the prism edges of the triple reflector. This can lead to faulty switching. Special accessories from the suppliers can be helpful here.
Reflection light barriers with polarizing filter work with polarized light. This type of retro-reflective sensor is also suitable for detecting shiny and reflective objects. When the polarized transmitted light hits the triple mirror, it is rotated by 90°. The receiver with polarizing filter detects the polarized light. Non-polarized light hitting the receiver is thus not taken into account. Retro-reflective sensors with polarizing filter work mainly with red light diodes. Polarization filters have a strong attenuating effect on the transmitted light and thus reduce the range of the reflex barrier.
Light-switching retro-reflective sensors
If transmitted light falls on the receiver because the target does not interrupt the light beam, the switching function is triggered. Conversely, if the transmitted light does not fall on the receiver because a measuring object interrupts the light beam of the transmitter, switching does not take place. No measuring object in the light beam: the output is not switched There is measuring object in the light beam: the output is switched
Dark switching retro-reflective sensors
If no transmitted light falls on the receiver because the measuring object interrupts the light beam, the switching function is triggered. Conversely, if the transmitted light falls on the receiver because no measuring object interrupts the light beam of the transmitter, the output is not switched. No measuring object in the light beam: the output is switched. With measuring object in the light beam: the output is not switched
What are retro-reflective photoelectric sensors and how do they work?
Retro-reflective photoelectric sensors are optical sensors that are used to detect objects or people. They consist of a light source, a receiver and a reflector.
The function of a retro-reflective photoelectric sensor is based on the principle of reflecting light. The light source emits a beam of light that hits the reflector and is reflected back to the receiver. If an object is located between the reflector and the receiver, the light beam is interrupted and the receiver recognizes this as a signal for the presence of the object.
The retro-reflective photoelectric sensor can be used in various applications, such as in industry for monitoring production processes, detecting people or controlling automated systems. They can also be used in security systems to monitor danger zones and trigger alarms when a person or object is detected.
There are different types of retro-reflective photoelectric sensors, including one-way photoelectric sensors, which only work in one direction, and two-way photoelectric sensors, where the transmitter and receiver are placed on opposite sides. The range of the light barriers can vary depending on the model, from a few centimeters to several meters.
The function of a retro-reflective photoelectric sensor is based on the principle of reflecting light. The light source emits a beam of light that hits the reflector and is reflected back to the receiver. If an object is located between the reflector and the receiver, the light beam is interrupted and the receiver recognizes this as a signal for the presence of the object.
The retro-reflective photoelectric sensor can be used in various applications, such as in industry for monitoring production processes, detecting people or controlling automated systems. They can also be used in security systems to monitor danger zones and trigger alarms when a person or object is detected.
There are different types of retro-reflective photoelectric sensors, including one-way photoelectric sensors, which only work in one direction, and two-way photoelectric sensors, where the transmitter and receiver are placed on opposite sides. The range of the light barriers can vary depending on the model, from a few centimeters to several meters.
What different types of retro-reflective photoelectric sensors are there?
There are different types of retro-reflective photoelectric sensors, which are used depending on the area of application:
1. One-way photoelectric sensor: With this type of light barrier, a light beam is sent from a transmitter to the reflective surface and then back to the receiver. If the light beam is interrupted, e.g. by an object, a signal is triggered.
2. Diffuse reflection sensor: Here, the light beam is directed from the transmitter onto a surface that reflects the light. The reflected beam then reaches the receiver. If this beam is interrupted, e.g. by an object, a signal is triggered.
3. Background suppression: This type of photoelectric sensor is used to detect objects that are located in front of a background. The transmitter sends a light beam towards the background and the receiver detects whether the light beam is interrupted by an object.
4. Transmitted light barrier: With this type of light barrier, the light beam is sent through the object to be detected. The receiver detects whether the light beam is blocked by the object.
5. Polarization light barrier: Here, the light beam is polarized to minimize reflections from surfaces. This enables more reliable detection of objects.
These different types of retro-reflective photoelectric sensors are used in various branches of industry, such as automation, the packaging industry or logistics.
1. One-way photoelectric sensor: With this type of light barrier, a light beam is sent from a transmitter to the reflective surface and then back to the receiver. If the light beam is interrupted, e.g. by an object, a signal is triggered.
2. Diffuse reflection sensor: Here, the light beam is directed from the transmitter onto a surface that reflects the light. The reflected beam then reaches the receiver. If this beam is interrupted, e.g. by an object, a signal is triggered.
3. Background suppression: This type of photoelectric sensor is used to detect objects that are located in front of a background. The transmitter sends a light beam towards the background and the receiver detects whether the light beam is interrupted by an object.
4. Transmitted light barrier: With this type of light barrier, the light beam is sent through the object to be detected. The receiver detects whether the light beam is blocked by the object.
5. Polarization light barrier: Here, the light beam is polarized to minimize reflections from surfaces. This enables more reliable detection of objects.
These different types of retro-reflective photoelectric sensors are used in various branches of industry, such as automation, the packaging industry or logistics.
How are retro-reflective photoelectric sensors used in industry?
Retro-reflective photoelectric sensors are used in industry for various purposes. Here are some examples:
1. Object recognition: Retro-reflective photoelectric sensors can be used to detect the presence or passage of an object. This can be used in the packaging industry, for example, to check whether a product has been packaged correctly.
2. Positioning: Retro-reflective photoelectric sensors can also be used to position objects. For example, they can be used in automated assembly lines to ensure that a part is placed in the correct position.
3. Counting: Retro-reflective photoelectric sensors can also be used to count objects. This can be used in the logistics industry, for example, to monitor the number of incoming and outgoing products.
4. Security: Retro-reflective photoelectric sensors can be used for the safety of employees. They can be installed on machines, for example, to prevent people from entering the danger zone.
5. Automation: Retro-reflective photoelectric sensors can also be used in automated processes to control the sequence of steps. For example, they can be used to recognize the start and end of a process and trigger corresponding actions.
These are just a few examples of the use of retro-reflective photoelectric sensors in industry. They can be used in many different ways and depend on the specific requirements of the application in question.
1. Object recognition: Retro-reflective photoelectric sensors can be used to detect the presence or passage of an object. This can be used in the packaging industry, for example, to check whether a product has been packaged correctly.
2. Positioning: Retro-reflective photoelectric sensors can also be used to position objects. For example, they can be used in automated assembly lines to ensure that a part is placed in the correct position.
3. Counting: Retro-reflective photoelectric sensors can also be used to count objects. This can be used in the logistics industry, for example, to monitor the number of incoming and outgoing products.
4. Security: Retro-reflective photoelectric sensors can be used for the safety of employees. They can be installed on machines, for example, to prevent people from entering the danger zone.
5. Automation: Retro-reflective photoelectric sensors can also be used in automated processes to control the sequence of steps. For example, they can be used to recognize the start and end of a process and trigger corresponding actions.
These are just a few examples of the use of retro-reflective photoelectric sensors in industry. They can be used in many different ways and depend on the specific requirements of the application in question.
What are the advantages of retro-reflective photoelectric sensors compared to other sensors?
Retro-reflective photoelectric sensors offer several advantages compared to other sensors:
1. Simple installation: Retro-reflective photoelectric sensors are easy to install and do not require complicated cabling or external devices.
2. Cost-effective: Most retro-reflective photoelectric sensors are inexpensive and can be produced in large quantities, making them an economical solution.
3. High sensitivity: Retro-reflective photoelectric sensors can detect small objects and are very sensitive, making them ideal for applications where precise measurements are required.
4. Reliability: Retro-reflective photoelectric sensors are robust and reliable. They can be used in various environments, including harsh industrial environments.
5. Non-contact-based recording: As retro-reflective photoelectric sensors are based on light, they are non-contact-based and can therefore be used in applications where direct contact with the object must be avoided.
6. Fast response time: Retro-reflective photoelectric sensors have a fast response time, making them ideal for applications where real-time detection is required.
7. Versatility: Retro-reflective photoelectric sensors can be used for various applications, such as position detection, object counting, flow measurement and presence detection.
1. Simple installation: Retro-reflective photoelectric sensors are easy to install and do not require complicated cabling or external devices.
2. Cost-effective: Most retro-reflective photoelectric sensors are inexpensive and can be produced in large quantities, making them an economical solution.
3. High sensitivity: Retro-reflective photoelectric sensors can detect small objects and are very sensitive, making them ideal for applications where precise measurements are required.
4. Reliability: Retro-reflective photoelectric sensors are robust and reliable. They can be used in various environments, including harsh industrial environments.
5. Non-contact-based recording: As retro-reflective photoelectric sensors are based on light, they are non-contact-based and can therefore be used in applications where direct contact with the object must be avoided.
6. Fast response time: Retro-reflective photoelectric sensors have a fast response time, making them ideal for applications where real-time detection is required.
7. Versatility: Retro-reflective photoelectric sensors can be used for various applications, such as position detection, object counting, flow measurement and presence detection.
How can retro-reflective photoelectric sensors be used for object detection and tracking?
Retro-reflective photoelectric sensors can be used for object detection and tracking by measuring the reflected light beam and reacting to changes in the intensity or pattern of the reflected light.
For object detection, the light barrier can be set so that it reacts to the presence or absence of an object in its detection area. If the object blocks the light beam, the intensity of the reflected light changes and the light barrier recognizes this as a signal that an object is present.
For object tracking, the light barrier can be configured so that it reacts to the movement of an object. When the object moves and crosses the light beam of the light barrier, the intensity or pattern of the reflected light changes again, and the light barrier can detect this change and track the movement of the object.
By combining several retro-reflective photoelectric sensors in a network, even more complex tasks such as tracking the speed, direction or position of an object can be realized. The light barriers can be connected in series to monitor the movement path of the object or arranged in a grid pattern to determine the exact position of the object.
Overall, retro-reflective photoelectric sensors offer a cost-effective and reliable method for object detection and tracking in various applications such as warehousing, robotics, industrial automation and safety systems.
For object detection, the light barrier can be set so that it reacts to the presence or absence of an object in its detection area. If the object blocks the light beam, the intensity of the reflected light changes and the light barrier recognizes this as a signal that an object is present.
For object tracking, the light barrier can be configured so that it reacts to the movement of an object. When the object moves and crosses the light beam of the light barrier, the intensity or pattern of the reflected light changes again, and the light barrier can detect this change and track the movement of the object.
By combining several retro-reflective photoelectric sensors in a network, even more complex tasks such as tracking the speed, direction or position of an object can be realized. The light barriers can be connected in series to monitor the movement path of the object or arranged in a grid pattern to determine the exact position of the object.
Overall, retro-reflective photoelectric sensors offer a cost-effective and reliable method for object detection and tracking in various applications such as warehousing, robotics, industrial automation and safety systems.
What factors influence the performance and accuracy of retro-reflective photoelectric sensors?
The performance and accuracy of retro-reflective photoelectric sensors can be influenced by various factors, including
1. Reflectivity of the object to be detected: The light barrier requires a sufficiently high reflectivity of the object in order to reflect the light and activate the detector. Objects with low reflectivity can impair the performance of the light barrier.
2. Distance to the object: The greater the distance between the light barrier and the object to be detected, the weaker the reflected light. The performance of the light barrier can therefore decrease with increasing distance.
3. Backlight: Strong backlighting can superimpose the reflected light and impair the accuracy of the light barrier. It may be necessary to take appropriate measures to minimize or compensate for the backlighting.
4. Ambient conditions: Factors such as dust, smoke or fog in the environment can scatter the reflected light and thus impair the accuracy of the light barrier. It may be necessary to take these environmental conditions into account and take protective measures if necessary.
5. Alignment of the light barrier: Correct alignment of the light barrier is crucial for its performance and accuracy. Incorrect alignment can lead to false alarms or incorrect detection.
6. Quality of the light source and the detector: The performance of the light barrier also depends on the quality of the light source and detector used. High-quality components can ensure better performance and accuracy.
7. Electrical faults: Electrical interference can impair the performance of the light barrier. It may be necessary to take appropriate protective measures to minimize the effects of interference.
These factors should be taken into account when planning and installing retro-reflective photoelectric sensors to ensure optimum performance and accuracy.
1. Reflectivity of the object to be detected: The light barrier requires a sufficiently high reflectivity of the object in order to reflect the light and activate the detector. Objects with low reflectivity can impair the performance of the light barrier.
2. Distance to the object: The greater the distance between the light barrier and the object to be detected, the weaker the reflected light. The performance of the light barrier can therefore decrease with increasing distance.
3. Backlight: Strong backlighting can superimpose the reflected light and impair the accuracy of the light barrier. It may be necessary to take appropriate measures to minimize or compensate for the backlighting.
4. Ambient conditions: Factors such as dust, smoke or fog in the environment can scatter the reflected light and thus impair the accuracy of the light barrier. It may be necessary to take these environmental conditions into account and take protective measures if necessary.
5. Alignment of the light barrier: Correct alignment of the light barrier is crucial for its performance and accuracy. Incorrect alignment can lead to false alarms or incorrect detection.
6. Quality of the light source and the detector: The performance of the light barrier also depends on the quality of the light source and detector used. High-quality components can ensure better performance and accuracy.
7. Electrical faults: Electrical interference can impair the performance of the light barrier. It may be necessary to take appropriate protective measures to minimize the effects of interference.
These factors should be taken into account when planning and installing retro-reflective photoelectric sensors to ensure optimum performance and accuracy.
How can retro-reflective photoelectric sensors be used in automation technology?
Retro-reflective photoelectric sensors are frequently used in automation technology to detect, count or position objects. They consist of a transmitter and a receiver that face each other. The transmitter emits a light beam that is reflected back by a reflective object and detected by the receiver. This creates a closed light path.
There are many possible applications for retro-reflective photoelectric sensors in automation technology:
1. Object recognition: Retro-reflective photoelectric sensors can be used to detect the presence or absence of objects in a specific area. If the light beam is interrupted, a signal is triggered that can be used as an input signal for other automation systems.
2. Counting: Retro-reflective photoelectric sensors can also be used to count the number of objects passing through a certain area. This is particularly useful in production lines to monitor production progress or to record the number of products manufactured.
3. Positioning: Retro-reflective photoelectric sensors can be used to determine the position of objects. By attaching several light barriers, the movement of objects in a specific area can be tracked and controlled. This is particularly important in applications such as robotics, where precise positioning is crucial.
4. Security: Retro-reflective photoelectric sensors can also be used for safety-related applications to monitor access to hazardous areas. If the light path is interrupted, an emergency stop signal is triggered to stop the machine or system and prevent potential danger to employees.
All in all, retro-reflective photoelectric sensors offer a cost-effective and reliable solution for object detection and positioning in automation technology. They are easy to install and can be used in many different applications.
There are many possible applications for retro-reflective photoelectric sensors in automation technology:
1. Object recognition: Retro-reflective photoelectric sensors can be used to detect the presence or absence of objects in a specific area. If the light beam is interrupted, a signal is triggered that can be used as an input signal for other automation systems.
2. Counting: Retro-reflective photoelectric sensors can also be used to count the number of objects passing through a certain area. This is particularly useful in production lines to monitor production progress or to record the number of products manufactured.
3. Positioning: Retro-reflective photoelectric sensors can be used to determine the position of objects. By attaching several light barriers, the movement of objects in a specific area can be tracked and controlled. This is particularly important in applications such as robotics, where precise positioning is crucial.
4. Security: Retro-reflective photoelectric sensors can also be used for safety-related applications to monitor access to hazardous areas. If the light path is interrupted, an emergency stop signal is triggered to stop the machine or system and prevent potential danger to employees.
All in all, retro-reflective photoelectric sensors offer a cost-effective and reliable solution for object detection and positioning in automation technology. They are easy to install and can be used in many different applications.
What other applications are there for retro-reflective photoelectric sensors outside industry?
Retro-reflective photoelectric sensors are also used outside of industry in various areas of application. Here are some examples:
1. Automotive industry: Retro-reflective photoelectric sensors are used in vehicles to detect the position of doors, windows or trunk lids. They can also be used as parking assistants to detect obstacles and measure the distance.
2. Traffic engineering: In traffic engineering, retro-reflective photoelectric sensors are used to detect vehicles at traffic lights, barriers or toll booths. They can also be used to measure speed.
3. Security systems: Retro-reflective photoelectric sensors can be part of security systems to monitor unauthorized access. They can be used in alarm systems, access control systems or to detect movement in certain areas.
4. Building automation: Retro-reflective photoelectric sensors can be used to control lighting systems. When a person enters or leaves a room, the light barrier can detect this and switch the light on or off accordingly.
5. Medical applications: In medical technology, retro-reflective photoelectric sensors are used for patient monitoring. For example, they can be used to monitor breathing or heartbeat.
6. Robotics: Retro-reflective photoelectric sensors can be used in robots to detect obstacles and avoid collisions. They can also be used for position determination to ensure that the robot moves within a certain range.
This list is not exhaustive and there are certainly other applications for retro-reflective photoelectric sensors outside industry, depending on the specific requirements and areas of use.
1. Automotive industry: Retro-reflective photoelectric sensors are used in vehicles to detect the position of doors, windows or trunk lids. They can also be used as parking assistants to detect obstacles and measure the distance.
2. Traffic engineering: In traffic engineering, retro-reflective photoelectric sensors are used to detect vehicles at traffic lights, barriers or toll booths. They can also be used to measure speed.
3. Security systems: Retro-reflective photoelectric sensors can be part of security systems to monitor unauthorized access. They can be used in alarm systems, access control systems or to detect movement in certain areas.
4. Building automation: Retro-reflective photoelectric sensors can be used to control lighting systems. When a person enters or leaves a room, the light barrier can detect this and switch the light on or off accordingly.
5. Medical applications: In medical technology, retro-reflective photoelectric sensors are used for patient monitoring. For example, they can be used to monitor breathing or heartbeat.
6. Robotics: Retro-reflective photoelectric sensors can be used in robots to detect obstacles and avoid collisions. They can also be used for position determination to ensure that the robot moves within a certain range.
This list is not exhaustive and there are certainly other applications for retro-reflective photoelectric sensors outside industry, depending on the specific requirements and areas of use.