Photoelectric Sensors
SICK WTB12-3P2431 Photoelectric sensor
SICK WTB12-3P2431 diffuse photoelectric sensor, PNP, part 1041411. Compact W12 housing for reliable object detection on conveyors and packaging lines.
Overview
The SICK WTB12-3P2431 (part number 1041411) is a diffuse photoelectric sensor in the compact W12 rectangular housing family with PNP switching output. It is a general-purpose presence sensor for conveyor lines, packaging machinery and general automation where one-sided mounting is required.
How It Works
The emitter and receiver share one housing. The emitter sends modulated light toward the target, and the object reflects part of it back to the receiver. When the received light exceeds the set threshold, the output switches. Sensitivity can be adjusted so the sensor adapts to light or dark targets and to different distances.
Key Features
- Compact W12 housing for straightforward mounting on machine frames
- PNP switching output suits common European control architectures
- Adjustable sensitivity to adapt to target color and distance
- Modulated light provides strong immunity to ambient light
- Clearly visible light spot simplifies alignment and fault diagnosis
- Rugged housing for continuous duty on production lines
Typical Applications
- Carton, case and package detection on conveyor systems
- Object presence checks in packaging machinery
- Product counting on accumulation conveyors
- Monitoring of infeed and discharge zones on processing lines
- General object detection in material handling equipment
Specifications
Attribute | Value |
|---|---|
Model | SICK WTB12-3P2431 |
Part number | 1041411 |
Detection principle | Diffuse (energetic) photoelectric |
Housing family | W12 compact rectangular |
Output type | PNP switching output |
Installation and Setup Notes
Diffuse sensors depend on the reflectivity of the target: light, flat and large objects return more light than dark, round or small ones. Mount the sensor at a distance that leaves margin for the darkest target on the line, and set the sensitivity with that object present. If a bright background reflects strongly behind a dark target, consider a background-suppression model instead.
Frequently Asked Questions
Does the WTB12-3P2431 detect dark objects?
Yes, but dark objects reflect less light, so the effective range is shorter than for light objects. Setting the sensitivity with the darkest production target ensures reliable detection.
Is a reflector needed?
No. This is a diffuse sensor; the object itself reflects the light back. Reflectors are used with retro-reflective models such as the WL12G series.
What output does it provide?
A PNP switching output with Light-ON or Dark-ON selection, compatible with standard PLC inputs.
Related Photoelectric Sensors
For a compact diffuse alternative, see the SICK WS12-3D2430. For a related compact diffuse model, see the SICK WTB11-2P2461.
