The Keyence LK-G400 is a precision-engineered laser displacement sensor head from the LK-G Series, designed for applications requiring wide-range, mid-to-long distance measurement with high accuracy. With its large measuring range, precise repeatability, and robust optical design, the LK-G400 provides a versatile solution for industries that require reliable performance across diverse targets and operating conditions.

The sensor operates at a reference distance of 400 mm in diffuse reflection mode and 398 mm in specular reflection mode, making it suitable for flexible installation in production environments. This configuration enables accurate measurement whether the target surface is matte or reflective, ensuring versatility across a wide range of materials and finishes.

A standout feature of the LK-G400 is its extended measuring range, which covers ±100 mm in diffuse reflection mode and ±99 mm in specular reflection mode. This broad measurement span allows engineers to capture large displacements, making it especially effective for inspecting larger parts, components with significant dimensional variation, or applications requiring more measurement depth.

Despite its wide range, the LK-G400 maintains excellent accuracy and stability, offering linearity of ±0.05% of full scale and a repeatability of 2 µm. This ensures that even subtle deviations are detected consistently, providing reliable data for critical inspection tasks. Such performance makes the sensor particularly suitable for industries like automotive, aerospace, and heavy equipment manufacturing, where both large-scale coverage and fine measurement accuracy are essential.

The sensor also benefits from its focused laser spot diameter of approximately 290 µm at the reference distance, enabling accurate profiling across broad surfaces. The laser’s small spot size ensures precise detection of surface variations without sacrificing the ability to cover larger measurement ranges. This balance of spot precision and range coverage makes the LK-G400 highly adaptable to complex inspection environments.

Durable and compact, the LK-G400 is designed to perform reliably under the continuous demands of industrial production. Its rugged construction allows it to withstand vibrations and environmental fluctuations while maintaining accuracy, ensuring long-term stability and minimal downtime.

The LK-G400 is widely applied in industries such as automotive, aerospace, electronics, packaging, and precision machining, where accurate mid-range displacement and profile measurement is essential. Typical applications include thickness inspection, flatness verification, large-part profiling, and dynamic monitoring of moving components.

In summary, the Keyence LK-G400 Laser Displacement Sensor Head delivers an excellent balance of extended measurement range, high repeatability, versatile reflection options, and precise spot focus. Reliable, accurate, and robust, it provides engineers with the performance and flexibility needed to meet demanding industrial measurement requirements.