The Keyence LK-G402 is a high-precision laser displacement sensor head in the LK-G Series, designed for mid-to-long range measurement applications that require both wide coverage and reliable accuracy. With its extended measuring range, excellent repeatability, and flexible reflection modes, the LK-G402 delivers dependable performance across a wide range of industrial inspection tasks.

The sensor is configured for a 400 mm reference distance in diffuse reflection mode and 398 mm in specular reflection mode, giving users flexibility in installation and application. This dual reflection capability ensures that the LK-G402 can measure both matte, diffuse surfaces and polished, reflective targets with equal stability, making it a versatile solution across industries.

Its broad measuring range of ±100 mm (diffuse) and ±99 mm (specular) allows engineers to capture large-scale displacements while maintaining high resolution. This capability is essential for applications such as profiling large components, detecting warpage or deformation, and measuring significant height variations in products. Despite its wide measurement span, the sensor maintains consistent accuracy, bridging the gap between long-range flexibility and precision.

One of the key strengths of the LK-G402 is its high accuracy, achieving linearity of ±0.05% of full scale and repeatability of 2 µm. These specifications ensure stable results even when measuring complex or fast-moving targets, making the sensor suitable for critical quality control processes. Its ability to detect subtle variations within a large measuring window provides a significant advantage in maintaining production standards.

The sensor also features a focused laser spot diameter of approximately 290 µm at the reference distance, allowing for precise detection of surface variations across wide inspection areas. This fine spot detail is critical for balancing accuracy and coverage, enabling the sensor to capture fine features without sacrificing large-scale measurement capability.

Designed for industrial environments, the LK-G402 combines robustness with compactness, ensuring reliable long-term operation even in challenging conditions. Its durable construction allows it to withstand environmental fluctuations, vibrations, and continuous operation, all while delivering consistent measurement performance.

Applications of the LK-G402 include automotive, aerospace, electronics, packaging, and heavy equipment manufacturing, where precise dimensional control and surface inspection are required. It is particularly effective for thickness monitoring, flatness verification, large-object profiling, and real-time displacement measurement in production lines.

In summary, the Keyence LK-G402 Laser Displacement Sensor Head delivers a unique combination of ±100 mm wide measurement range, 2 µm repeatability, dual reflection flexibility, and fine spot resolution. Built for mid-to-long range applications, it provides manufacturers with the accuracy, reliability, and adaptability needed to ensure quality in modern automation environments.