| Switching frequency max. | 3 kHz |
| Switching output | PNP/ NPN |
| Switching type | light/dark switching |
Contrast scanners
Contrast scanners are sensors that detect contrasts and differences in reflections. They can be used to detect objects or to automatically control processes.
Contrast scanners consist of a transmitter that emits a light signal and a receiver that detects the reflected signal. When the light hits an object, it is reflected and the receiver picks up the signal. Contrast scanners measure the difference between the reflected signal and the ambient light to detect contrast.
Modern contrast scanners can also be combined with other sensors, such as ultrasonic or angle sensors, to provide a more accurate measurement. They are often used in industry to detect objects on a conveyor belt or to monitor the presence of material in an automated production line.
Contrast scanners are an efficient and accurate method of measuring differences in reflectivity and can be used in many applications.
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Contrast scanners consist of a transmitter that emits a light signal and a receiver that detects the reflected signal. When the light hits an object, it is reflected and the receiver picks up the signal. Contrast scanners measure the difference between the reflected signal and the ambient light to detect contrast.
Modern contrast scanners can also be combined with other sensors, such as ultrasonic or angle sensors, to provide a more accurate measurement. They are often used in industry to detect objects on a conveyor belt or to monitor the presence of material in an automated production line.
Contrast scanners are an efficient and accurate method of measuring differences in reflectivity and can be used in many applications.
... Read more
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| Operating scanning range | 30 mm |
| Adjustment options | Remote teach Teach button |
| Light source/transmitted light | White LED |
Part of the reflected light is reflected towards the receiver / photoelectric proximity switch and triggers the switching operation. Contrast scanners are optimized for detecting weak contrast differences. The differences in brightness between the sensing object and the mark applied to it are evaluated.
Depending on the color of the print marks and the different surfaces on which they are applied, the selection of the light color is of great importance for clear recognition. The light color must be selected so that the greatest possible contrast is obtained. Contrast masters with 3-color LED light are also offered. Manually or automatically the color is selected that generates the highest contrast between the print mark and the substrate, such as labels, cardboard, foils. Once the correct setting of the contrast sensor has been selected, it can be taught-in using the teach-in function.
Optoelectronic contrast sensors detect gray value differences on glossy, matte and transparent surfaces.
A short response time is very important for the detection of products passing quickly on a conveyor belt, for example. Only in this way can the contrast sensor detect the passing print marks quickly enough and trigger the corresponding switching signals. Depending on the sensor version, the switching information can be output to the system via a digital switching output or an interface. Contrast sensors are mainly used in printing and packaging machines.
Depending on the color of the print marks and the different surfaces on which they are applied, the selection of the light color is of great importance for clear recognition. The light color must be selected so that the greatest possible contrast is obtained. Contrast masters with 3-color LED light are also offered. Manually or automatically the color is selected that generates the highest contrast between the print mark and the substrate, such as labels, cardboard, foils. Once the correct setting of the contrast sensor has been selected, it can be taught-in using the teach-in function.
Optoelectronic contrast sensors detect gray value differences on glossy, matte and transparent surfaces.
A short response time is very important for the detection of products passing quickly on a conveyor belt, for example. Only in this way can the contrast sensor detect the passing print marks quickly enough and trigger the corresponding switching signals. Depending on the sensor version, the switching information can be output to the system via a digital switching output or an interface. Contrast sensors are mainly used in printing and packaging machines.
What is a contrast scanner and what is it used for?
A contrast sensor is a type of sensor that is used to measure the difference in brightness or color between two surfaces. It is often used in industrial applications to detect the presence or absence of a specific object.
The contrast scanner normally consists of a light source and a receiver. The light is directed onto the surface and the receiver measures the reflected brightness or color. If the contrast between the surface and the background is sufficient, a signal is triggered to indicate the presence of the object.
The contrast scanner is often used in the packaging industry to ensure that labels or barcodes are correctly applied to packaging. It can also be used in the food industry to detect the presence of foreign bodies such as metal or plastic in packaged food.
Overall, the contrast scanner serves to improve quality assurance, increase productivity and avoid possible errors or defects in production.
The contrast scanner normally consists of a light source and a receiver. The light is directed onto the surface and the receiver measures the reflected brightness or color. If the contrast between the surface and the background is sufficient, a signal is triggered to indicate the presence of the object.
The contrast scanner is often used in the packaging industry to ensure that labels or barcodes are correctly applied to packaging. It can also be used in the food industry to detect the presence of foreign bodies such as metal or plastic in packaged food.
Overall, the contrast scanner serves to improve quality assurance, increase productivity and avoid possible errors or defects in production.
How does a contrast scanner work and how does it differ from other scanners?
A contrast button works in a similar way to other button types, but with one important difference: It creates a clearly noticeable contrast when actuated. This contrast can be achieved, for example, by a raised button cap, a special shape or a different surface finish.
The contrast button is often used to make it easier for people with limited fine motor skills or visual impairments to operate devices. The noticeable contrast makes it easier to find and press the right button.
Compared to other button types, such as mechanical buttons or touch-sensitive sensors, the main difference lies in the haptic feedback. While mechanical buttons are actuated by a physical switch and touch-sensitive sensors react to touch, the contrast button generates a clearly perceptible resistance or a change in the surface when pressed.
This haptic feedback creates an additional level of information that increases user-friendliness. The contrast button enables people with motor or visual impairments to operate devices safely and intuitively.
The contrast button is often used to make it easier for people with limited fine motor skills or visual impairments to operate devices. The noticeable contrast makes it easier to find and press the right button.
Compared to other button types, such as mechanical buttons or touch-sensitive sensors, the main difference lies in the haptic feedback. While mechanical buttons are actuated by a physical switch and touch-sensitive sensors react to touch, the contrast button generates a clearly perceptible resistance or a change in the surface when pressed.
This haptic feedback creates an additional level of information that increases user-friendliness. The contrast button enables people with motor or visual impairments to operate devices safely and intuitively.
What different types of contrast scanner are there and what attributes do they have?
There are different types of contrast scanners, which can be distinguished according to their function and attributes. Here are some of them:
1. Visual contrast scanner: These buttons are characterized by a strong visual contrast between the button cap and the surrounding surface. They can be realized, for example, by a light key cap on a dark background or vice versa. This type of push-button is particularly helpful for people with visual impairments.
2. Tactile contrast scanner: These buttons have a different surface structure or texture compared to the surrounding surface. For example, they can have ribbing, a pattern or a raised texture to enable tactile differentiation. This type of push button is particularly useful for people with a limited sense of touch.
3. Acoustic contrast buttons: When pressed, these buttons produce a clearly audible sound that stands out from the surrounding background noise. This can be achieved using a click or clack mechanism, for example. Acoustic contrast buttons are particularly helpful for people with hearing impairments.
4. Temperature contrast sensor: These buttons have a different temperature compared to the surrounding surface. For example, they can be cool or warm in order to differentiate between temperatures. This type of push button is particularly useful for people with sensory impairments.
5. Size contrast button: These buttons have a larger or smaller size compared to the surrounding keyboard or surface. For example, they can have an enlarged or reduced keycap to enable visual or tactile differentiation. This type of push button is particularly helpful for people with motor impairments.
It is important to note that the choice of the right type of contrast scanner depends on the individual needs and limitations of the user. It may also be the case that different types of contrast scanners are combined to ensure optimum contrast and differentiation.
1. Visual contrast scanner: These buttons are characterized by a strong visual contrast between the button cap and the surrounding surface. They can be realized, for example, by a light key cap on a dark background or vice versa. This type of push-button is particularly helpful for people with visual impairments.
2. Tactile contrast scanner: These buttons have a different surface structure or texture compared to the surrounding surface. For example, they can have ribbing, a pattern or a raised texture to enable tactile differentiation. This type of push button is particularly useful for people with a limited sense of touch.
3. Acoustic contrast buttons: When pressed, these buttons produce a clearly audible sound that stands out from the surrounding background noise. This can be achieved using a click or clack mechanism, for example. Acoustic contrast buttons are particularly helpful for people with hearing impairments.
4. Temperature contrast sensor: These buttons have a different temperature compared to the surrounding surface. For example, they can be cool or warm in order to differentiate between temperatures. This type of push button is particularly useful for people with sensory impairments.
5. Size contrast button: These buttons have a larger or smaller size compared to the surrounding keyboard or surface. For example, they can have an enlarged or reduced keycap to enable visual or tactile differentiation. This type of push button is particularly helpful for people with motor impairments.
It is important to note that the choice of the right type of contrast scanner depends on the individual needs and limitations of the user. It may also be the case that different types of contrast scanners are combined to ensure optimum contrast and differentiation.
What are the advantages of using contrast scanners in technical applications?
The use of contrast scanners in technical applications offers several advantages:
1. Simple operation: Contrast switches are usually equipped with large, clearly visible buttons that are easy to recognize and operate. This makes operation easier for people with impaired vision or motor impairments.
2. Security: Contrast buttons can be designed to provide clear tactile feedback when pressed. This improves security as users receive clear confirmation that their command has been recognized.
3. Accessibility: Technical applications can be made barrier-free through the use of contrast buttons. People with visual impairments can easily recognize and operate the buttons, which enables them to participate in the application.
4. Flexibility: Contrast buttons can be available in different colors and sizes to meet individual user requirements. This enables greater flexibility in the design of technical applications.
5. Efficiency: By using contrast buttons, users can operate the application faster and more efficiently as they can easily recognize and press the buttons. This can increase productivity and improve the user experience.
Overall, contrast sensors offer an improved user experience, increased safety and accessibility as well as greater efficiency in technical applications.
1. Simple operation: Contrast switches are usually equipped with large, clearly visible buttons that are easy to recognize and operate. This makes operation easier for people with impaired vision or motor impairments.
2. Security: Contrast buttons can be designed to provide clear tactile feedback when pressed. This improves security as users receive clear confirmation that their command has been recognized.
3. Accessibility: Technical applications can be made barrier-free through the use of contrast buttons. People with visual impairments can easily recognize and operate the buttons, which enables them to participate in the application.
4. Flexibility: Contrast buttons can be available in different colors and sizes to meet individual user requirements. This enables greater flexibility in the design of technical applications.
5. Efficiency: By using contrast buttons, users can operate the application faster and more efficiently as they can easily recognize and press the buttons. This can increase productivity and improve the user experience.
Overall, contrast sensors offer an improved user experience, increased safety and accessibility as well as greater efficiency in technical applications.
What disadvantages or limitations are associated with the use of contrast scanners?
The use of contrast scanners can have some disadvantages or limitations:
1. Limited availability: Contrast buttons may not be available in all situations or environments. It can be difficult to find them in public areas or older buildings.
2. Insufficient contrast: Although contrast scanners are designed to assist people with visual impairments, they can sometimes have insufficient contrast. This can mean that they are still difficult for some people to recognize.
3. Lack of standardization: There are no uniform standards for contrast scanners. This means that they look different from place to place and can differ in their arrangement. This can lead to confusion, especially for people who are not familiar with different designs.
4. Limited information transfer: Contrast scanners are primarily used to indicate obstacles and hazards. However, they do not provide any detailed information about what is behind the button. This can be problematic for people with visual impairments who need additional information.
5. Lack of sensitivity: Contrast scanners are not usually equipped with sensory functions that react to touch or pressure, for example. This can be problematic for people with limited mobility or motor impairments, as they may have difficulty activating the button.
It is important to note that many of these limitations can be minimized through proper design and implementation of contrast scanners. Accessibility should always be seen as a holistic approach that takes into account different needs and abilities.
1. Limited availability: Contrast buttons may not be available in all situations or environments. It can be difficult to find them in public areas or older buildings.
2. Insufficient contrast: Although contrast scanners are designed to assist people with visual impairments, they can sometimes have insufficient contrast. This can mean that they are still difficult for some people to recognize.
3. Lack of standardization: There are no uniform standards for contrast scanners. This means that they look different from place to place and can differ in their arrangement. This can lead to confusion, especially for people who are not familiar with different designs.
4. Limited information transfer: Contrast scanners are primarily used to indicate obstacles and hazards. However, they do not provide any detailed information about what is behind the button. This can be problematic for people with visual impairments who need additional information.
5. Lack of sensitivity: Contrast scanners are not usually equipped with sensory functions that react to touch or pressure, for example. This can be problematic for people with limited mobility or motor impairments, as they may have difficulty activating the button.
It is important to note that many of these limitations can be minimized through proper design and implementation of contrast scanners. Accessibility should always be seen as a holistic approach that takes into account different needs and abilities.
How are contrast scanners used in industry and which sectors benefit most from their use?
Contrast scanners are used in industry to detect subtle differences in surface texture or color. They work on the basis of the principle of light reflection and make it possible to distinguish objects by their high or low reflectivity.
Contrast scanners are used in various industries. Some examples are:
1. Automotive industry: In the automotive industry, contrast scanners are often used for quality control to detect surface defects on body parts, paint damage or dirt particles.
2. packaging industry: In the packaging industry, contrast scanners are used to read and check labels or barcodes on packaging.
3. Food industry: Contrast scanners are used in the food industry to monitor the quality of food, e.g. to detect discoloration or foreign bodies.
4. pharmaceutical industry: In the pharmaceutical industry, contrast scanners are used to inspect drug packaging to ensure that labels are attached correctly and that the packaging is intact.
5. electronics industry: In the electronics industry, contrast scanners are used to monitor the assembly of electronic components, for example to ensure that printed circuit boards are correctly positioned or that solder joints have been made correctly.
These industries benefit most from the use of contrast scanners as they require high precision and reliability in quality control. By using contrast scanners, defects can be detected at an early stage and waste reduced, resulting in improved product quality and efficiency.
Contrast scanners are used in various industries. Some examples are:
1. Automotive industry: In the automotive industry, contrast scanners are often used for quality control to detect surface defects on body parts, paint damage or dirt particles.
2. packaging industry: In the packaging industry, contrast scanners are used to read and check labels or barcodes on packaging.
3. Food industry: Contrast scanners are used in the food industry to monitor the quality of food, e.g. to detect discoloration or foreign bodies.
4. pharmaceutical industry: In the pharmaceutical industry, contrast scanners are used to inspect drug packaging to ensure that labels are attached correctly and that the packaging is intact.
5. electronics industry: In the electronics industry, contrast scanners are used to monitor the assembly of electronic components, for example to ensure that printed circuit boards are correctly positioned or that solder joints have been made correctly.
These industries benefit most from the use of contrast scanners as they require high precision and reliability in quality control. By using contrast scanners, defects can be detected at an early stage and waste reduced, resulting in improved product quality and efficiency.
What future developments or trends can be expected in the field of contrast scanners?
A number of developments and trends can be expected in the area of contrast scanners in the future:
1. Improved accuracy: Contrast scanners are expected to offer greater accuracy to enable even more precise measurements. This can be achieved, for example, by using more advanced sensor technologies.
2. Extended measuring range: Future contrast scanners could have an extended measuring range in order to be able to carry out reliable measurements even with extreme contrast differences. This could be particularly relevant in applications that require high contrast differences, such as the quality control of surface coatings.
3. Integration of artificial intelligence (AI): In the future, contrast scanners could be equipped with AI algorithms to automatically recognize and analyze patterns and features. This could further improve the efficiency and reliability of the measurements and simplify operation.
4. Wireless connectivity: Future contrast scanners could offer wireless connectivity options to facilitate data transfer and analysis. This would make it possible to monitor measurement results in real time and communicate wirelessly with other devices or systems.
5. Integrated calibration functions: In the future, contrast scanners could have integrated calibration functions to enable quick and easy calibration. This would simplify maintenance and operation of the devices and improve measurement accuracy.
6. Miniaturization: Future contrast scanners could be smaller and more compact to enable use in tighter environments or with smaller components. This would expand the application possibilities and facilitate use in various sectors.
It should be noted that these developments and trends are based on current technological advances and market requirements and may evolve over time.
1. Improved accuracy: Contrast scanners are expected to offer greater accuracy to enable even more precise measurements. This can be achieved, for example, by using more advanced sensor technologies.
2. Extended measuring range: Future contrast scanners could have an extended measuring range in order to be able to carry out reliable measurements even with extreme contrast differences. This could be particularly relevant in applications that require high contrast differences, such as the quality control of surface coatings.
3. Integration of artificial intelligence (AI): In the future, contrast scanners could be equipped with AI algorithms to automatically recognize and analyze patterns and features. This could further improve the efficiency and reliability of the measurements and simplify operation.
4. Wireless connectivity: Future contrast scanners could offer wireless connectivity options to facilitate data transfer and analysis. This would make it possible to monitor measurement results in real time and communicate wirelessly with other devices or systems.
5. Integrated calibration functions: In the future, contrast scanners could have integrated calibration functions to enable quick and easy calibration. This would simplify maintenance and operation of the devices and improve measurement accuracy.
6. Miniaturization: Future contrast scanners could be smaller and more compact to enable use in tighter environments or with smaller components. This would expand the application possibilities and facilitate use in various sectors.
It should be noted that these developments and trends are based on current technological advances and market requirements and may evolve over time.