The SICK KT8L-N3756 (Part No. 1041352) is a high-performance laser contrast sensor designed to meet the stringent requirements of modern industrial automation. As part of the KT8 family, it combines advanced laser technology, rugged construction, and fast response times to provide dependable mark and contrast detection, even in challenging environments.

At the core of this sensor is a red laser emitter operating at 655 nm, projecting a Ø 3 mm round light spot from the long side of its metal housing. This precise laser beam enables the detection of small marks, fine print, or subtle contrast variations that are common in industries such as packaging, labeling, printing, and material handling. The round beam ensures even illumination and consistent detection across surfaces.

The KT8L-N3756 features a nominal sensing distance of 150 mm, with an adjustable detection window spanning from 30 mm up to 600 mm. This wide range of operation offers flexibility in different application setups. Users can configure the sensor quickly and easily using teach-in modes. It supports both static two-point teach-in for defined conditions and dynamic min/max teach-in for moving targets or variable backgrounds. To maintain consistent performance over time, the unit also includes automatic drift correction, which compensates for gradual changes in ambient light or environmental factors.

In terms of speed and responsiveness, the KT8L-N3756 excels with a switching frequency of 17 kHz, an ultra-fast 30 µs response time, and jitter of less than 15 µs. These specifications make it well suited for high-speed production environments where rapid detection and feedback are essential. It is equipped with both a digital NPN switching output and a 0.3–20 mA analog output, making integration straightforward with different control systems, whether binary or process-driven.

Mechanically, the sensor is designed for durability. It is enclosed in a zinc die-cast housing with IP67 protection, safeguarding it from dust ingress and temporary immersion in water. Measuring approximately 30.4 mm × 53 mm × 80 mm and weighing around 400 g, the sensor provides a compact yet solid form factor. It connects via a 5-pin M12 male connector, supporting standard industrial wiring practices. Operating voltage ranges from 10 to 30 V DC, with a current consumption of less than 80 mA. Additional features include protection against reverse polarity, short circuits, and electrical interference, ensuring reliable long-term operation.

In summary, the SICK KT8L-N3756 is a precision laser contrast sensor that delivers high-speed, accurate, and flexible detection in a rugged housing. With its combination of fast response, versatile outputs, and robust design, it is an excellent solution for industries that demand both reliability and precision in contrast or mark detection tasks.