The SICK 1059537 (GRL18S-E1331) is a diffuse photoelectric sensor designed for dependable object detection in compact industrial environments. As part of the GR18 sensor family, it offers a balance of precise optical performance, rugged construction, and straightforward integration, making it a reliable solution for a variety of automation tasks.

This model uses a diffuse sensing principle, meaning it detects objects directly by the light reflected from their surfaces. The GRL18S-E1331 provides a sensing range from 30 mm to 1 m, making it well suited for short- to medium-distance applications such as presence detection, part positioning, and object counting. With built-in background suppression, it maintains accuracy even when reflective or uneven surfaces are present in the environment.

Illumination comes from a visible red PinPoint LED operating at 650 nm. The focused light spot simplifies installation and ensures that even small or irregularly shaped objects can be reliably detected. The sharp and clearly visible beam also makes it easier for operators to align the sensor quickly during setup, saving time and reducing potential errors.

Performance is another strength of the GRL18S-E1331. It features an NPN light-switching output, meaning the output signal is triggered when light is reflected back to the sensor. With a fast response time of less than 500 µs and a switching frequency of up to 1,000 Hz, it is ideal for applications requiring rapid detection, such as conveyor systems, packaging equipment, or high-speed sorting operations. The sensor supports a maximum output current of 100 mA, ensuring compatibility with a wide range of industrial control systems.

The unit is housed in a compact M18-threaded radial ABS enclosure with overall dimensions of 18 √ó 18 √ó 38.1 mm. Despite its small size, the GRL18S-E1331 is engineered for durability, with an IP67 protection rating that safeguards it against dust and temporary water immersion. This makes it well suited for use in demanding industrial environments. For user convenience, the sensor is supplied with a 2 m PVC cable and mounting nuts, simplifying installation and integration.

To further support ease of use, the GRL18S-E1331 includes status indicator LEDs. A green LED confirms that power is supplied, while a yellow LED indicates the switching state, making diagnostics and alignment straightforward.

Overall, the SICK GRL18S-E1331 delivers reliable diffuse sensing performance, fast response, and rugged design in a compact housing. It is an excellent choice for automation engineers needing accurate and efficient short-range detection in space-constrained applications.