VZET Photoelectric Sensor
A photoelectric sensor is a device that detects objects by leveraging light signals, accurately identifying their presence, position, color, or distance.
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Product Details
1. Product Overview
A photoelectric sensor is a device that detects objects by leveraging light signals, accurately identifying their presence, position, color, or distance. It operates by emitting light beams and capturing changes in reflected or transmitted light, providing efficient and reliable detection solutions across diverse industries such as industrial automation, robotics, security, and consumer electronics.
2. Core Principle
(1) Light Emission & Reception
● Transmitting End: Equipped with an LED or laser diode as a light source, emitting various light beams (e.g., visible light, infrared light).
● Receiver: Utilizes photosensitive components (e.g., phototransistors, photodiodes) to capture optical signals.
● Signal Processing: Converts optical signals into electrical signals, analyzes light intensity changes via internal circuits, and triggers output signals (e.g., switch signals).
(2) Detection Logic
When an object interrupts or reflects the light beam, it alters the light intensity detected by the receiver. The sensor interprets these changes to determine the object’s position or state.
3. Product Types
(1) Through-Beam (Opposed Mode)
● Working Principle: The transmitter and receiver are separate. Detection is triggered when an object blocks the light beam between them.
● Features:
● Ultra-long detection distance (up to 100 meters).
● Strong anti-interference capability.
● Requires separate installation of transmitter and receiver.
(2) Retroreflective (Reflective with Retroreflector)
● Working Principle: The transmitter and receiver are integrated in one unit. The emitted light is reflected back by a retroreflector; detection occurs when an object blocks the reflected beam.
● Features:
● Simple installation, suitable for medium-range detection (up to several meters).
(3) Diffuse Reflective
● Working Principle: Detects light diffusely reflected from the object’s surface without a separate retroreflector.
● Features:
● Single-sided installation.
● Shorter detection range (typically several centimeters to meters).
● Detection accuracy depends on object color and surface texture.
(4) Fiber Optic
● Working Principle: Uses optical fibers to transmit light signals, enabling miniaturized sensor heads.
● Features:
● Excellent resistance to electromagnetic interference, high temperatures, and corrosion.
● Ideal for confined spaces or harsh environments.
(5) Color/Mark Sensor
● Working Principle: Identifies colors or specific markings by analyzing the wavelength or intensity of reflected light.
● Applications: Commonly used in printing quality inspection, label positioning, and similar scenarios.
4. Key Performance Parameters
● Detection Distance: The maximum range where the sensor operates stably and reliably.
● Response Time: The time from object detection to signal output (typically in microseconds).
● Light Source Types: Options include infrared (high anti-interference), red visible light (easy calibration), and laser (high precision).
● Output Types: Supports NPN/PNP switch signal outputs.
5. Usage Precautions
(1) Environmental Interference
● Avoid direct exposure to strong light (e.g., sunlight may interfere with infrared sensors).
● Use modulated light sensors to enhance anti-interference capability.
(2) Object Characteristics
● Transparent or highly reflective objects may require filter-type sensors or coding controller adjustments.
(3) Installation & Calibration
● For retroreflective sensors, ensure precise alignment of the transmitter and receiver.
● For diffuse reflective sensors, account for background objects that may affect detection.
(4) Maintenance
● Regularly clean the lens or fiber optic end face to prevent dust from reducing detection sensitivity.
6. Common Issues & Solutions
|
Issue |
Possible Causes |
Solutions |
|
Mistriggering |
Environmental light interference |
Adjust sensor sensitivity or enable filtering in the controller. |
|
Unstable Detection |
Uneven object surface reflection |
Switch to a retroreflective photoelectric sensor. |
|
Failure to Detect Transparent Objects |
High light transmittance |
Use a diffuse reflective photoelectric sensor. |
|
Response Delay |
Inadequate sensor response time |
Select a sensor with microsecond-le |
Company Reality
Wuhan VZ Information Technology Co., Ltd., established in 2018 , and located in Wuhan, China with convenient transportation accesses , is a professional company engaged in the sale and service of mini color inkjet printers, inkjet printers, continuous inkjet printers, laser marking machines, and the relevant ink consumables. We have a wide range of coding and marking machines to meet customers' different needs in their applications and at the same time, we are making great efforts to develop new products to meet different requirements. Dedicated to strict quality control and thoughtful customer service, our experienced staff members are always available to discuss your requirements and ensure full customer satisfaction. Adhering to the business principle of mutual benefits, we have had a reliable reputation among our customers because of our professional services, quality products and competitive prices.
Honor & Certificates
Adhering to the business principle of mutual benefits, we have had a reliable reputation among our customers because of our professional services, quality products and competitive prices. Our cooperated manufacturers have obtained CE, ISO9001 certificates.
Exhibition & Cooperation
Our cooperated manufacturers have obtained C E, I S O 9 0 0 1 certificates. Selling well in all cities and provinces around China, our products are also exported to clients in such countries and regions as north and south America, Africa, Europe . We also welcome O E M and O D M orders. Whether selecting a current product from our catalog or seeking engineering assistance for your application, you can talk to our customer service center about your sourcing requirements and we are glad to send you more details and help you choose the most suitable products.
FAQ
Why choose a laser with adjustable pulse width?
Fixed pulse width cannot accurately control the depth of laser beam on the surface, making objects more prone to deformation; Short pulse width beam combined with adjustable frequency can reduce the thermal effect of objects and prevent thin materials from deforming easily.
What advantages can good beam quality bring?
The damage on the surface of the object is smaller, and the thermal effect area is smaller.
What are the dry, water-based, and oil-based ink characteristics of ink cartridges for fully automatic inkjet printers?
Dry ink cartridge: Dry ink is mainly composed of pigment particles and volatile solvents. After printing, the solvent quickly evaporates, leaving behind dry pigment particles and forming stable images. Water based ink cartridge: Water based ink uses water as the main solvent, with added pigments or dyes and a small amount of additives. It has good environmental friendliness and is easily absorbed by paper after printing. Oil ink cartridge: Oil ink is mainly composed of organic solvents and has good water resistance and weather resistance. It can print bright and long-lasting images.
What are the types of laser machines?
Segmenting CO2 laser machines by application scenarios: clothing cutting, organic glass carving, high precision non-metallic processing, and high maintenance costs. Fiber laser machine: It is used for welding car bodies, with fast speed, low energy consumption, and easy to produce burrs when cutting aluminum materials. UV laser machine: cutting brittle materials for mobile phone screens, cold processing without thermal deformation, low power limit (<30W)
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E-mail：info@vzjet.com
Address: 24/F, Building 7, Oceanwide International Soho Town, Jianghan District, Wuhan, Hubei, China
