$ 161.23
SICK WTB9M4-3P1161 photoelectric sensor with background suppression delivers precise object detection, fast response, and reliable performance in compact industrial setups.
The SICK WTB9M4-3P1161 photoelectric proximity sensor is a compact sensing solution engineered for accurate object detection in tight installation spaces. It uses background suppression technology to reliably detect targets within a defined distance while ignoring objects positioned behind them. A focused visible red PinPoint LED ensures precise light guidance, making it suitable for detecting small or low-contrast items. With a sensing capability extending up to 350 mm and a slim rectangular housing, this sensor addresses common challenges such as false detection, limited mounting space, and unstable sensing caused by reflective backgrounds.
In industrial automation environments, the SICK WTB9M4-3P1161 provides dependable performance where precision and speed are critical. Background suppression helps maintain consistent switching even when conveyor belts, frames, or reflective surfaces are present behind the target. The tightly focused light spot improves detection accuracy for small components, labels, or packaging edges. Its fast response time supports high-speed production lines, while the rugged housing with high ingress protection ratings allows stable operation in washdown areas, dusty zones, and temperature-variable factory floors.
Why SICK WTB9M4-3P1161?
The SICK WTB9M4-3P1161 is chosen when precision, stability, and compact design must work together without compromise. Its background suppression technology and sharply focused PinPoint LED allow it to distinguish real targets from surrounding structures with confidence. Combined with fast switching, high ingress protection, and a slim housing, it fits seamlessly into modern automated machines where space is limited but performance expectations are high.
What problem does it solve?
The SICK WTB9M4-3P1161 solves unreliable object detection caused by reflective backgrounds, varying surface colors, and tight installation constraints. In many production lines, sensors struggle with false triggers or missed detections when backgrounds interfere. This model isolates the target distance precisely, ensuring consistent detection of small, dark, or irregular objects, even in high-speed, washdown, or harsh industrial environments.
| Feature | Details | Benefit |
|---|---|---|
| Sensor Type | Photoelectric proximity sensor | Reliable non-contact object detection in automated systems |
| Detection Principle | Background suppression | Prevents false triggering from reflective or moving backgrounds |
| Light Source | Visible red PinPoint LED (650 nm) | Highly focused light spot for precise detection of small objects |
| Sensing Range (Typical) | 20 mm to 200 mm | Stable detection for common short-range applications |
| Sensing Range (Maximum) | Up to 350 mm | Flexibility to handle varying installation distances |
| Light Spot Size | Approx. Ø 4.5 mm at 75 mm | Accurate detection of edges, small parts, and narrow targets |
| Adjustment Method | 5-turn potentiometer | Fine and repeatable setting of sensing distance |
| Switching Output | PNP, complementary | Easy integration with standard PLC and control systems |
| Switching Mode | Light-on / Dark-on | Adaptable logic behavior for different control strategies |
| Response Time | < 0.333 ms | Supports high-speed production and fast-moving objects |
| Switching Frequency | Up to 1,500 Hz | Reliable operation in rapid-cycle automation processes |
| Supply Voltage | 10 V DC to 30 V DC | Compatible with common industrial power supplies |
| Output Current | ≤ 100 mA | Direct connection to control inputs without additional relays |
| Housing Design | Compact rectangular body | Ideal for space-limited machine designs |
| Housing Material | Plastic (VISTAL®) | Durable and lightweight for long-term industrial use |
| Optics Material | PMMA plastic | Stable optical performance over extended service life |
| Protection Rating | IP66, IP67, IP69K | Suitable for dusty, wet, and washdown environments |
| Operating Temperature | –40 °C to +60 °C | Reliable performance in cold storage and hot factory floors |
| Mounting Interface | M4 mounting hole | Simple and secure mechanical installation |
| Service Life (Light Source) | Approx. 100,000 hours | Reduced maintenance and long operational lifetime |
Download SICK WTB9M4-3P1161 (1051887) Datasheet
| Commercial Data | Details |
|---|---|
| EAN Number | 4047084238581 |
| Weight | 93 g |
| Country of Origin | Germany |
In automated packaging lines, sensors must detect cartons and parcels accurately while products move at high speed. The SICK WTB9M4-3P1161 is effective in these environments because it detects objects at a defined distance and ignores conveyor rollers or frames located behind the target. This prevents false triggering caused by reflective metal or moving backgrounds. The focused PinPoint LED allows the sensor to detect small package edges and uneven surfaces reliably. Its fast response time supports rapid throughput without missed detections, helping maintain smooth material flow and reducing unplanned stops on high-volume conveyor systems.
Automated assembly processes often require confirmation that a component is correctly positioned before the next operation begins. The SICK WTB9M4-3P1161 supports this requirement by reliably detecting small, dark, or low-contrast parts inside fixtures. Background suppression prevents surrounding tooling and holders from influencing the sensing result. The narrow light spot improves accuracy when checking clips, connectors, or precision-placed components. Its compact housing fits easily into confined assembly stations, while quick switching enables short cycle times, helping manufacturers maintain productivity and reduce assembly errors.
In intralogistics and material handling systems, confirming the correct position of bins or totes is essential before lifting, sorting, or transfer actions occur. The SICK WTB9M4-3P1161 provides dependable position detection by focusing on the object distance rather than surface color or background structures. This reduces misalignment issues and prevents incorrect machine movements. The sensor performs consistently across a wide temperature range, making it suitable for warehouses, cold storage areas, and production floors. Its durable construction supports continuous operation in dusty and vibration-prone environments.
Food, beverage, and chemical processing environments demand sensors that remain accurate despite frequent cleaning and harsh conditions. The SICK WTB9M4-3P1161 is well suited for these areas due to its high ingress protection and robust housing. Background suppression ensures stable detection even when shiny stainless-steel surfaces surround the target. The visible red light simplifies alignment during installation and maintenance. This enables consistent object detection for container presence checks, spacing control, or machine status monitoring, even during regular washdown cycles and temperature fluctuations.
| Category | Model Name | Part Number | Benefits |
|---|---|---|---|
| Mounting Accessory | BEF-KHS-N08 | 2051607 | Universal clamp plate allows flexible sensor alignment on frames and machine profiles |
| BEF-W160 | 5305197 | Wall mounting bracket provides stable and fixed sensor installation | |
| BEF-KHS-N11N | 2071081 | Stainless steel mounting solution ideal for washdown and corrosive environments | |
| Connector / Cable | STE-0804-G | 6037323 | Compact M8 connector ensures reliable electrical connection in tight spaces |
| STE-1204-G | 6009932 | M12 connector supports robust wiring for industrial control systems |
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.
