The SICK KT8L-P3756 (Part No. 1041351) is a precision-engineered contrast sensor designed to deliver accurate detection of marks, labels, and subtle contrast differences in demanding industrial environments. As part of the KT8 series, it integrates advanced sensing technology, rugged mechanical design, and fast response capability to ensure reliable performance across a wide range of applications.

At its core, the KT8L-P3756 employs a red laser emitter that generates a finely focused Ø 3 mm round light spot. The laser beam exits from the long side of the housing, making it ideal for detecting small print marks, color transitions, or minor surface variations with high clarity. This feature is especially valuable in high-speed production lines where precision in tracking or alignment is critical.

The sensor has a standard sensing distance of 150 mm and an adjustable range from 30 mm to 600 mm. This flexibility allows it to be tailored to different operational setups and product geometries. Configuration is straightforward, thanks to intuitive teach-in modes. Operators can select between static two-point teach-in for fixed settings and dynamic min/max teach-in for varying conditions. Additionally, automatic drift correction ensures long-term stability, even when environmental or process variables change.

Performance is a hallmark of this model. The KT8L-P3756 offers up to 17 kHz switching frequency, an exceptionally fast 30 µs response time, and a jitter of less than 15 µs. These specifications make it highly suited for fast-moving processes, ensuring accurate detection without delays. The sensor provides both a PNP switching output for binary control systems and a 0.3–20 mA analog output, adding versatility for integration into analog-based monitoring or control setups.

Mechanically, the unit is built to last. It features a zinc die-cast housing with IP67 protection, offering resistance against dust and water ingress. Measuring about 30.4 mm × 53 mm × 80 mm and weighing roughly 400 g, the sensor is compact yet solid. Connection is made via a 5-pin M12 male connector, ensuring compatibility with standard industrial wiring. It runs on 10–30 V DC supply, consumes less than 80 mA, and incorporates protective functions such as reverse-polarity protection, short-circuit resistance, and interference suppression.

In summary, the SICK KT8L-P3756 combines precise laser-based contrast detection, fast switching performance, flexible teach-in configuration, and rugged housing design. It is a reliable solution for modern industrial automation where both speed and precision are essential, making it ideal for printing, packaging, labeling, and other applications requiring dependable mark detection.