Functional principle: Photoelectric retro-reflective sensor
Functional principle detail: Without reflector minimum distance (autocollimation/coaxial optics)
Sensing range max.: 0 m … 15 m 1)
Polarisation filters: Yes
Light source: Laser 2)
Type of light: Visible red light
High‑precision retro‑reflective sensing with visible red laser: Detects objects up to 12 m using a focused red laser beam, providing accurate detection for industrial automation applications.

High‑precision retro‑reflective sensing with visible red laser: Detects objects up to 12 m using a focused red laser beam, providing accurate detection for industrial automation applications.
Adjustable focus from 200 mm to infinity: Allows precise control over sensing distance to accommodate both short-range and long-range detection tasks.
Dual switching outputs (PNP/NPN) with light/dark switching modes: Offers flexible integration with a variety of control systems, supporting both operational configurations.
Compact and robust industrial design with IP67 rating: Durable rectangular housing ensures protection against dust and water ingress, suitable for harsh industrial environments.

The SICK WL12L‑2B520 (part number 1018253) is a high-performance photoelectric retro-reflective sensor designed for precise and reliable object detection in industrial environments. Utilizing a visible red laser, this sensor provides a highly focused beam capable of detecting objects up to 12 meters away, ensuring consistent performance for a variety of applications, including production lines, packaging systems, and automated assembly processes.

A key feature of the WL12L‑2B520 is its adjustable focus system, which allows operators to set the sensing distance from 200 mm to infinity. This flexibility enables the sensor to adapt to different operational scenarios, whether it’s detecting small components at close range or monitoring larger objects at extended distances. The sharp laser spot ensures even small or fast-moving objects are reliably detected, minimizing errors and optimizing throughput.

The sensor supports dual output configurations—PNP and NPN—along with selectable light or dark switching modes, providing seamless integration into diverse control systems. These options allow users to configure the sensor’s behavior according to specific process requirements. Additionally, a built-in potentiometer enables easy adjustment of the switching threshold, making fine-tuning straightforward and enhancing detection precision.

Designed for demanding industrial conditions, the WL12L‑2B520 features a compact rectangular housing with an IP67 rating, ensuring resistance to dust and water ingress. This robust construction allows reliable operation in challenging environments such as manufacturing plants, food processing facilities, and outdoor installations. The sensor also includes mounting clamps and screws for quick and secure installation on machines or production lines.

Operating with a supply voltage range of 10–30 V DC and drawing approximately 55 mA, the WL12L‑2B520 is energy-efficient and compatible with standard industrial power supplies. Its class 2 laser designation ensures safe use while delivering precise detection performance.

In summary, the SICK WL12L‑2B520 combines high-precision retro-reflective sensing, adjustable focus, flexible output configurations, and durable construction in a compact form. It is an ideal solution for industrial applications requiring accurate, reliable, and adaptable object detection.