The SICK 1059542 (GRL18S-P1331) is a diffuse photoelectric sensor engineered for accurate, reliable, and fast detection in industrial automation. Designed as part of the GR18 sensor family, it delivers compact dimensions, advanced optical performance, and rugged construction, making it suitable for a wide variety of short- to medium-range detection applications.

Using a diffuse sensing principle, the GRL18S-P1331 detects light reflected directly from the surface of objects without requiring a separate reflector. With a sensing range of 30 mm to 1 m, it is well suited for applications such as part detection, conveyor monitoring, product positioning, and object counting. Built-in background suppression enhances reliability by ensuring that reflective or shiny surfaces in the background do not interfere with the sensor’s performance.

The sensor employs a visible red PinPoint LED emitter operating at 650 nm, producing a concentrated and clearly visible light spot. This sharp beam makes alignment quick and simple during installation while also enabling the detection of small or irregularly shaped objects with high accuracy. The focused light spot provides a clear visual indicator of the sensing area, reducing errors during setup and improving overall reliability in operation.

From a performance standpoint, the GRL18S-P1331 features a PNP light-switching output. The output becomes active when the sensor detects reflected light, enabling straightforward integration into standard industrial control systems. With a response time of less than 500 µs and a switching frequency of up to 1,000 Hz, the sensor is designed to handle high-speed automation tasks such as fast conveyor systems, high-volume packaging lines, and rapid sorting processes. It also supports output loads up to 100 mA, ensuring robust compatibility with a wide range of controllers.

Durability and installation flexibility are key strengths of this device. Housed in a compact M18-threaded ABS enclosure measuring 18 √ó 18 √ó 38.1 mm, the sensor is built to last in tough industrial environments. With an IP67 protection rating, it resists dust and temporary water immersion, ensuring consistent performance in demanding conditions. The GRL18S-P1331 comes equipped with a 2 m PVC cable and includes mounting nuts, simplifying setup and integration into existing systems.

For added convenience, the sensor features two LED indicators: a green LED to confirm power supply and a yellow LED to display the switching state. These indicators make alignment, monitoring, and troubleshooting straightforward.

In summary, the SICK GRL18S-P1331 combines compact design, reliable diffuse sensing, fast switching performance, and robust housing. It is an excellent solution for automation engineers who need a dependable short-range sensor for high-speed, space-constrained industrial applications.