The SICK 1059541 (GRL18S-F1331) is a high-performance retro-reflective photoelectric sensor designed to deliver precise and dependable object detection in industrial automation systems. As part of the GR18 series, it combines a compact housing with advanced optical capabilities, offering a versatile solution for detecting objects across a wide range of distances and conditions.

This model employs a retro-reflective dual-lens system, allowing it to sense objects from 30 mm up to 7.2 m. Such a broad detection range makes it suitable for both close-range applications, such as presence verification, and long-distance uses like conveyor monitoring or material handling. The dual-lens arrangement improves detection reliability and minimizes the impact of ambient light or challenging backgrounds, ensuring consistent performance.

The GRL18S-F1331 is equipped with a visible red PinPoint LED emitter, which operates at 650 nm. The sharply defined light spot makes sensor alignment straightforward, saving time during installation while also allowing operators to visually confirm the sensing area. With a beam spot size of approximately 175 mm at 7 m, the LED ensures accurate object recognition, even at the far end of its sensing range.

Performance is enhanced by the sensor’s NPN dark-switching output. The output is active when the light beam is interrupted, providing reliable and direct integration into existing control systems. The sensor supports loads up to 100 mA and offers a response time under 500 µs along with a switching frequency up to 1,000 Hz. This makes it ideal for high-speed industrial applications where fast and accurate detection is required, such as counting items, verifying product presence, or controlling flow on high-speed conveyors.

Durability is built into the device’s M18-threaded ABS housing, which measures just 18 × 18 × 38.1 mm. Despite its compact size, the housing is rugged and rated to IP67, ensuring resistance to dust and water ingress. The sensor comes with a 2 m PVC cable and mounting nuts, simplifying installation and integration in a wide range of industrial setups.

For ease of operation and troubleshooting, the GRL18S-F1331 includes two LED indicators. A green LED provides power status, while a yellow LED shows the switching state, allowing quick alignment checks and reducing setup time.

In summary, the SICK GRL18S-F1331 delivers long-range sensing capability, fast and reliable switching, and rugged construction in a compact package. Its precision optics, durable housing, and high responsiveness make it a dependable choice for automation engineers seeking a reliable retro-reflective sensor for demanding industrial environments.