SICK WTF12-3N1131 Photoelectric Sensor with Foreground Suppression

SICK WTF12-3N1131 Photoelectric Sensor with Foreground Suppression

The SICK WTF12-3N1131 photoelectric sensor is engineered to deliver dependable detection performance, especially when objects vary in surface finish or reflectivity. Its foreground suppression technology ensures stable measurement within a defined range of 30 mm to 175 mm, supported by a bright red LED for simple alignment. Built with a compact metal housing and high protection classes, it is suitable for harsh industrial settings where moisture, vibration, or temperature fluctuations are common. Designed for detecting flat materials, this sensor provides consistent operation in packaging lines, assembly environments, and other automated workflows.

The WTF12-3N1131 enhances productivity by combining fast reaction capability with precise optical characteristics. With a response time of ≤330 µs and a switching frequency of 1,500 Hz, it supports applications where rapid object movement demands immediate feedback. Its multi-turn potentiometer allows users to fine-tune performance to specific installation needs, while complementary NPN outputs expand integration flexibility. The sensor’s sturdy metal enclosure, PMMA front window, and durable PVC cable provide long-term reliability, even in washdown or outdoor-like conditions. These qualities reduce false triggers, improve detection accuracy, and help maintain smooth, interruption-free operations.

Why WTF12-3N1131?

The WTF12-3N1131 is ideal for automation systems that demand precise, dependable detection regardless of object finish or color. Its optimized optical design and foreground suppression deliver consistent results, while its rugged metal body and high protection ratings allow it to thrive in demanding industrial conditions. It’s engineered for reliability, speed, and stable detection where conventional sensors struggle.

What Problem Does It Solve?

This model solves the challenge of detecting flat or low-contrast objects that often cause instability in standard sensors. With its fast response, tightly focused light spot, and adjustable sensing range, it minimizes false triggers and ensures accuracy even when materials vary in reflectivity. It enables production lines to maintain smooth throughput without sensor-related interruptions.

Key Features & Specifications – SICK WTF12-3N1131: 1041410

Download SICK WTF12-3N1131 (1041410) Datasheet

Commercial Information – SICK WTF12-3N1131 (1041410)

The Applications of the WTF12-3N1131 Photoelectric Sensor

1. High-Speed Carton Presence Detection on Packaging Lines

Packaging conveyors often handle flat cartons that offer little height difference from the belt, making them difficult to detect reliably. The WTF12-3N1131 helps overcome this by creating a controlled detection window that ignores reflections from the conveyor surface while responding only to objects inside its sensing range. Its rapid switching speed ensures it captures each carton even when spacing is tight or line speeds increase. This stability allows machines such as folding units, barcode verifiers, and gluing systems to trigger at precisely the right moment. By preventing missed reads and reducing false activations, the sensor supports smoother throughput and fewer manual interventions during busy production cycles.

2. Edge Detection for Thin Metal Sheets in Stamping Operations

Metal stamping equipment depends on exact feed positioning, yet reflective steel or aluminum sheets often disrupt conventional sensors due to inconsistent surface brightness. The WTF12-3N1131 counters this by projecting a small, concentrated light spot that reliably identifies the sheet edge regardless of surface finish or lubricant conditions. Foreground suppression prevents background reflections from interfering with detection, even near polished machine surfaces. This ensures the press receives accurate confirmation before each cycle, helping reduce tool wear and improve product uniformity. With dependable sheet registration, operators can maintain higher speeds without sacrificing accuracy, ultimately reducing scrap and minimizing unplanned downtime caused by sensing instability.

3. Tray Position Monitoring in Hygienic Food Processing Lines

Automated food handling often uses dark, molded trays that become difficult to detect when exposed to moisture, condensation, or residues. The WTF12-3N1131 provides stable results by focusing on the target plane and disregarding the reflective or wet surfaces beneath it. Its rugged construction and high protection ratings allow frequent washdowns without affecting performance. By maintaining consistent detection at each station—whether for filling, sealing, or portion control—the sensor helps prevent empty trays from passing unnoticed or filled trays from being misrouted. This dependable sensing reduces waste, keeps product flow steady, and supports high hygiene standards within fast-moving food production environments.

4. Position Verification of Flat PCB Panels in Electronics Assembly

Electronics manufacturers rely on accurate board placement before routing or component insertion. PCB panels are thin, matte, and vary in color, making them challenging for general-purpose sensors. The WTF12-3N1131 uses its adjustable detection range to focus precisely on the PCB surface and ignore the bench or fixture beneath it. The concentrated red light spot ensures the sensor sees the board edge clearly without interference from surrounding hardware. This enables machines to start processing only when the panel is correctly aligned, reducing placement errors and avoiding costly rework. Over time, stable detection improves line consistency and supports more predictable automated assembly operations.

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