SICK WL9G-3P2232 Retro-Reflective Photoelectric Sensor for Transparent Object Detection
The SICK WL9G-3P2232 retro-reflective photoelectric sensor is designed to deliver stable and accurate detection of transparent, translucent, and glossy objects in industrial automation. By combining coaxial optics with a visible red PinPoint LED, it addresses common sensing issues caused by glass, clear plastics, and reflective packaging. Its compact W9 housing allows easy installation in tight machine layouts, while the extended sensing range supports flexible mounting. The WL9G-3P2232 is well suited for applications that demand high reliability, fast response, and consistent switching performance in continuously operating production lines.
In real-world use, the WL9G-3P2232 helps manufacturers reduce false detections and downtime when handling clear bottles, films, or transparent containers. Automatic signal adaptation maintains stable operation despite changing background conditions, while fast switching enables precise control on high-speed conveyors. The rugged enclosure withstands washdown processes, temperature fluctuations, and harsh industrial environments. Simple teach-in adjustment shortens commissioning time and simplifies maintenance, making the sensor practical for frequent product changeovers. Overall, it improves process reliability, minimizes rejects, and supports long-term operational efficiency across packaging, food, and logistics systems.
Why SICK WL9G-3P2232?
SICK WL9G-3P2232 is chosen when detection reliability cannot be compromised, especially with transparent or reflective materials. Its coaxial optical design and intelligent signal adaptation work together to maintain stable switching even when objects vary in shape, thickness, or surface finish. The compact W9 housing fits easily into space-limited machines, while fast response and robust environmental protection support continuous, high-speed operation. For system integrators and maintenance teams, it offers predictable performance, simple setup, and long-term operational stability in demanding industrial environments.
What Problem Does It Solve?
Transparent packaging, glass containers, and shiny surfaces often cause standard sensors to misread or miss targets, leading to production errors and downtime. The SICK WL9G-3P2232 solves this by providing consistent detection where light refraction, reflection, or background interference typically disrupt sensing. Its stabilized signal processing reduces false triggers and missed detections, ensuring accurate object presence confirmation. As a result, production lines achieve smoother flow, fewer rejects, and improved quality control without frequent sensor adjustments or complex recalibration.
Key Features & Specifications – SICK WL9G-3P2232: 1049082
| Feature |
Details |
Benefit |
| Sensor Type |
Retro-reflective photoelectric sensor |
Reliable object detection with a single sensor and reflector |
| Optical Principle |
Coaxial optics (autocollimation) |
Stable detection of transparent and glossy objects |
| Light Source |
Visible red PinPoint LED, 650 nm |
Precise, focused light spot for accurate sensing |
| Special Capability |
Optimized for transparent object detection |
Reduces false switching on glass and clear plastics |
| Sensing Range |
Up to 3 m (up to 5 m with suitable reflector) |
Flexible installation for short and medium distances |
| Light Spot Size |
Ø 45 mm at 1.5 m |
Consistent detection over varying object sizes |
| Switching Output |
PNP, complementary |
Easy integration with standard PLC inputs |
| Switching Speed |
< 0.5 ms response time |
Supports high-speed conveyors and fast processes |
| Switching Frequency |
Up to 1,000 Hz |
Reliable operation in dynamic applications |
| Adjustment Method |
Single teach-in button with AutoAdapt |
Fast commissioning and easy changeover |
| Polarizing Filter |
Integrated |
Suppresses reflections from shiny backgrounds |
| Supply Voltage |
10–30 V DC |
Compatible with common industrial power systems |
| Output Current |
Up to 100 mA |
Direct connection to control systems |
| Connection Type |
M8, 4-pin male connector |
Compact and secure electrical connection |
| Housing Material |
Plastic (VISTAL®), PMMA optics |
Lightweight yet durable construction |
| Protection Rating |
IP66 / IP67 / IP69K |
Suitable for washdown and harsh environments |
| Operating Temperature |
–40 °C to +60 °C |
Reliable performance in extreme conditions |
| Mounting |
M3 mounting holes |
Easy installation in compact machine designs |
| Certifications |
CE, UKCA, cULus, ECOLAB |
Approved for global industrial use |
Download SICK WL9G-3P2232 (1049082) Datasheet
Commercial Information – SICK WL9G-3P2232 (Part No. 1049082)
| Commercial Data |
Details |
| EAN Number |
4047084172298 |
| Weight |
44 g |
| Country of Origin |
Germany |
The Applications
1. Transparent Bottle Detection on High-Speed Beverage Lines
In beverage filling and labeling operations, clear PET and glass bottles frequently cause unstable detection due to refraction and surface reflections. The SICK WL9G-3P2232 overcomes this by using a coaxial retro-reflective optical principle that maintains a consistent signal path. Its fast response time allows accurate bottle presence detection even on high-speed conveyors. Automatic signal adaptation compensates for differences in bottle wall thickness, shape, and light tint, reducing false switching. This enables precise timing for filling, capping, and labeling processes, helping production lines operate smoothly with fewer interruptions and improved output consistency.
2. Clear Film and Blister Pack Monitoring in Packaging Machines
Packaging equipment handling transparent films or blister materials requires reliable sensing to control sealing, cutting, and indexing sequences. The WL9G-3P2232 is effective in this role because it can detect clear materials that are difficult for standard sensors to recognize. Its focused light emission ensures accurate detection within compact machine frames, while high switching frequency supports rapid machine cycles. Simple teach-in adjustment shortens setup during product changes. This combination helps reduce material waste, avoids misalignment during sealing operations, and improves overall packaging efficiency across different product formats.
3. Transparent Container Positioning in Pharmaceutical Automation
Pharmaceutical lines often process transparent vials, ampoules, or syringes that must be accurately positioned for filling, inspection, or labeling. The WL9G-3P2232 provides stable detection without being affected by reflections from stainless steel machine parts. Its compact design allows close mounting near moving components, while its rugged construction supports frequent cleaning routines. Reliable detection minimizes the risk of misfeeds and jams, helping maintain precise positioning. This leads to fewer rejected units, better process control, and consistent operation in environments with strict quality and hygiene requirements.
4. Clear Tote and Tray Detection in Automated Intralogistics
Automated conveyor and sorting systems increasingly use transparent plastic totes and trays for material transport. These carriers can be difficult to detect reliably, especially under changing ambient light conditions. The WL9G-3P2232 ensures consistent presence detection regardless of background reflections or lighting variations. Its fast switching supports real-time routing and accumulation control, while wide temperature tolerance allows operation in both ambient and cold storage areas. By preventing missed detections and incorrect conveyor actions, the sensor supports smooth material flow and reliable performance in high-throughput intralogistics systems.
Related Products & Accessories
| Category |
Model Name |
Part Number |
Benefits |
| Mounting Bracket |
BEF-WN-W9-2 |
2022855 |
Dedicated steel mounting bracket designed for W9-3 sensors, enabling secure and vibration-resistant installation |
| Universal Clamp Plate |
BEF-KHS-N08 |
2051607 |
Zinc-plated steel clamp system for flexible mounting and easy alignment in compact machine layouts |
| Universal Clamp Plate (Stainless Steel) |
BEF-KHS-N11N |
2071081 |
Corrosion-resistant stainless-steel mounting solution suitable for washdown and hygienic environments |
| Fine Triple Reflector |
P250F |
5308843 |
High-performance reflector for extended sensing distances and improved signal reserve |
| Sensor Cable (PVC) |
YF8U14-050VA3XLEAX |
2095889 |
M8, 4-pin sensor cable for standard industrial environments |
| Sensor Cable (PUR, Halogen-Free) |
YF8U14-050UA3XLEAX |
2094792 |
Robust cable for drag chain, robotic motion, and oil-exposed areas |
| Connector |
STE-0804-G |
6037323 |
M8, 4-pin connector with screw terminals for quick and secure wiring |
For expert guidance before placing your order.
Warranty – 1-year warranty for your peace of mind.
Global Shipping – We ship worldwide with secure packaging and reliable delivery.
Technical Support – Contact us for professional after-sales technical assistance.
