SICK WTB9M4-3P2461 Photoelectric Sensor with Background Suppression

$ 161.23

SICK WTB9M4-3P2461 compact photoelectric sensor with background suppression, fast response, precise detection, and reliable performance in industrial automation.

SKU SICK-1051891 Category

Product Description

SICK WTB9M4-3P2461 Photoelectric Sensor with Background Suppression

The SICK WTB9M4-3P2461 photoelectric sensor with background suppression is a compact proximity sensor engineered for accurate object detection in tight industrial installations. It uses a visible red PinPoint LED to clearly distinguish targets from fixed backgrounds, helping prevent false switching caused by reflections or nearby surfaces. This makes it especially effective where objects vary in color or finish. With its slim W9 housing, fast response, and durable construction, the sensor is well suited for automated equipment that requires stable, repeatable detection under continuous operation.

In practical automation scenarios, the SICK WTB9M4-3P2461 improves process reliability by detecting only the intended object while ignoring background structures such as machine frames or conveyor belts. This reduces setup time and minimizes unplanned stops caused by incorrect sensing. The sharply focused light spot supports precise detection of small parts, while the high switching speed allows accurate monitoring on fast-moving lines. Its rugged enclosure and wide temperature tolerance enable dependable use in packaging, material handling, and factory automation environments where long-term stability is essential.

Why SICK WTB9M4-3P2461?
The SICK WTB9M4-3P2461 stands out because it delivers precision sensing in a remarkably compact form. Its background suppression capability allows the sensor to focus only on the target, even in crowded or reflective environments. Combined with a fast response time, fine light spot, and industrial-grade protection, it offers a dependable solution for designers who need accuracy, stability, and long service life without increasing machine size or system complexity.

What problem does it solve?
The SICK WTB9M4-3P2461 solves the common challenge of unreliable object detection caused by background reflections, color variations, or tight mounting distances. Traditional sensors often trigger on unintended surfaces, leading to miscounts and downtime. By clearly separating the target from its surroundings, this sensor ensures consistent detection, smoother process flow, and higher productivity in automated production, packaging, and material handling systems.

 


Key Features & Specifications – SICK WTB9M4-3P2461: Part Number 1051891

Feature Details Benefit
Detection Principle Background suppression Reliably detects targets while ignoring fixed backgrounds
Light Source Visible red PinPoint LED (650 nm) Provides a clearly defined light spot for precise alignment
Sensing Range 20 mm to 200 mm (typical), up to 350 mm max Flexible detection distance for varied applications
Light Spot Size Approx. Ø 4.5 mm at 75 mm Accurate detection of small or closely spaced objects
Switching Output PNP, complementary Easy integration with standard PLC inputs
Switching Mode Light switching / dark switching Adaptable logic for different control strategies
Response Time < 0.333 ms Supports high-speed production and conveyor systems
Switching Frequency Up to 1,500 Hz Ensures reliable detection of fast-moving objects
Adjustment Method 5-turn potentiometer Fine, stable adjustment for precise setup
Supply Voltage 10 V DC to 30 V DC Compatible with common industrial power systems
Current Consumption Approx. 30 mA (no load) Energy-efficient operation
Housing Design Compact rectangular W9 housing Ideal for space-constrained installations
Dimensions (W × H × D) 12.2 × 52.2 × 23.6 mm Allows mounting in tight mechanical layouts
Connection Type M12, 4-pin male connector Fast, secure, and standardized wiring
Enclosure Rating IP66 / IP67 / IP69K Reliable operation in dust, washdown, and harsh environments
Operating Temperature –40 °C to +60 °C Stable performance in extreme ambient conditions
Housing Material Plastic (VISTAL®) Durable and lightweight for long-term use
Weight Approx. 13 g Minimal load on mounting structures
Certifications CE, UKCA, cULus, ECOLAB Suitable for global industrial and hygienic applications

Download SICK WTB9M4-3P2461 (1051891) Datasheet

 


Commercial Information – SICK WTB9M4-3P2461 (Part No. 1051891)

Commercial Data Details
EAN Number 4047084176883
Weight 44 g
Country of Origin Germany

 


The Applications for the SICK WTB9M4-3P2461

1. High-Speed Conveyor Object Counting

On fast-moving conveyor lines, object detection becomes unreliable when products differ in color, size, or surface reflectivity. The SICK WTB9M4-3P2461 is effective in these situations because background suppression allows it to focus only on the product and ignore the conveyor structure below. Its rapid response supports accurate counting at high speeds, while the compact housing enables installation close to rollers and guides. This combination helps prevent missed counts, reduces false triggers, and keeps production data accurate even as throughput increases.

2. Accurate Triggering in Packaging and Cartoning Machines

Packaging systems require precise timing to ensure cartons, trays, or pouches are filled and sealed correctly. Reflective materials and nearby metal frames often confuse conventional sensors. The WTB9M4-3P2461 overcomes this by distinguishing the target from surrounding surfaces, maintaining stable switching regardless of packaging material. The focused light spot supports edge detection and repeatable positioning. This improves machine synchronization, minimizes stoppages caused by misdetection, and supports consistent output quality on high-speed packaging lines.

3. Small Component Presence Detection in Automated Assembly

In automated assembly cells, confirming that a small part is correctly positioned before the next step is critical. The WTB9M4-3P2461 is well suited for this task due to its fine detection capability at short distances. Background suppression prevents interference from fixtures or work surfaces behind the component. This ensures reliable presence verification, reduces assembly errors, and supports automated quality control. The fast switching behavior also aligns well with short cycle times common in modern assembly operations.

4. Stable Sensing in Harsh Industrial Conditions

Industrial environments often expose sensors to dust, vibration, moisture, and temperature variation. The WTB9M4-3P2461 is designed to maintain consistent detection under these conditions. Its robust housing protects internal optics, while background suppression reduces the impact of reflections caused by contamination or nearby structures. The compact design allows protected mounting within machinery, helping extend service life. This leads to fewer maintenance interventions, improved system uptime, and reliable operation in demanding industrial settings.

 


Related Products & Accessories – SICK WTB9M4-3P2461

Category Model Name Part Number Benefits
Mounting Accessory BEF-KHS-N08 2051607 Flexible universal clamp mounting with precise sensor alignment
BEF-W160 5305197 Stable wall or panel installation for fixed detection points
BEF-KHS-N11N 2071081 Stainless steel design for hygienic or corrosive environments
Connector STE-0804-G 6037323 Compact M8 connection for space-limited wiring layouts
STE-1204-G 6009932 Standard M12 connector for secure industrial sensor connections
Sensor Cable YF2A14-050VB3XLEAX 2096235 PVC cable suitable for general industrial applications
YF2A14-050UB3XLEAX 2095608 PUR cable ideal for drag chain use and oil-resistant environments

 


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