The Keyence LK-G405 is a specialised laser displacement sensor head from the LK-G Series, designed for applications requiring wide-field measurement and long-range precision. With its elongated laser spot, broad measurement span, and robust accuracy, the LK-G405 is particularly effective in inspecting large targets or surfaces where stable detection across a wide area is essential.

The sensor is configured for a reference distance of 400 mm in diffuse reflection mode and 398 mm in specular reflection mode, making it versatile enough to handle both matte and reflective surfaces. This adaptability allows the LK-G405 to perform accurately across different material types, from polished metals to textured composites, ensuring consistent results in diverse environments.

One of the most distinctive features of the LK-G405 is its elongated laser spot, measuring approximately 290 × 8,300 µm at the reference distance. Unlike conventional circular spot sensors, the elongated spot design enables the sensor to average out localised surface irregularities, providing stable readings on rough, uneven, or patterned targets. This makes it particularly valuable for applications such as wood processing, sheet material inspection, or any scenario where consistent height data is required across non-uniform surfaces.

The sensor also provides a broad measuring range of ±100 mm in diffuse mode and ±99 mm in specular mode, enabling it to accommodate large displacements. Despite this wide coverage, it maintains linearity of ±0.05% of full scale and repeatability of 2 µm, offering the accuracy needed for industries where precision and reliability are non-negotiable.

Its ability to capture stable data across wide areas makes the LK-G405 suitable for challenging applications, such as detecting warpage, inspecting large sheet thicknesses, or monitoring irregular targets moving at high speed. The sensor’s combination of long-range capability, wide-area spot, and high repeatability ensures consistent performance even under demanding production conditions.

Durability is another strength of the LK-G405. Built to withstand continuous use in industrial environments, its robust design ensures dependable operation in manufacturing settings that experience vibrations, environmental changes, or long production cycles. Its integration into automated systems is straightforward, thanks to its compact build and compatibility with LK-G Series controllers.

Industries such as automotive, aerospace, woodworking, packaging, and heavy equipment manufacturing benefit from the LK-G405’s unique measurement capabilities. Applications include sheet thickness verification, warp detection, dimensional control of large components, and surface stability inspection.

In summary, the Keyence LK-G405 Laser Displacement Sensor Head stands out with its elongated spot design, long-range measurement capability, high precision, and versatile reflection modes. By offering stable detection across broad, irregular surfaces, it provides engineers with a powerful tool for accurate, efficient measurement in large-scale and complex industrial applications.