The Keyence GT-A22L Sensor Head is a specialised contact-type displacement measurement device from the GT Series, designed with a low-stress air push mechanism. By using controlled air pressure to extend the probe, it applies minimal force on workpieces, ensuring accurate measurements without causing damage or deformation. This makes it ideal for applications involving delicate or precision-engineered components.

With a measuring range of 22 mm (0.87″), the GT-A22L provides ample stroke for medium-range displacement measurements. This allows it to accommodate a wide variety of part sizes and inspection requirements while maintaining excellent consistency. Its repeatability of 8 ¬µm (0.00031″) ensures that measurements are precise and reliable, even under continuous operation, making it suitable for high-volume inspection tasks.

One of the key advantages of the GT-A22L is its low measuring force. When mounted downward, the probe applies just 0.35 N of force. This extremely light contact helps prevent scratches, dents, or stress on sensitive materials such as thin metals, plastics, semiconductors, or precision-machined surfaces. It also extends probe life by reducing wear on both the probe tip and the workpiece.

The GT-A22L is compact and lightweight, with a weight of only 180 g including its 2 m (6.6 ft) cable. This makes it easy to install in automated inspection setups or integrate into multi-sensor systems without adding unnecessary bulk. Its streamlined design supports flexible mounting orientations, allowing engineers to incorporate it into tight or complex machine layouts.

As part of the GT Series, the GT-A22L integrates seamlessly with compatible amplifier units, enabling straightforward setup and reliable data transmission. The air push mechanism is particularly beneficial in automated environments, as it allows smooth extension and retraction of the probe without mechanical springs. This reduces friction, enhances measurement stability, and supports long-term durability.

Industries such as electronics manufacturing, automotive, semiconductor processing, and precision machining benefit significantly from the GT-A22L. Typical applications include measuring thin films, delicate assemblies, small machined parts, or components where even slight pressure could affect accuracy or cause damage.

Beyond precision, the GT-A22L also improves operational efficiency. Its repeatability and low-force design reduce measurement variability, allowing operators to trust inspection results without the need for repeated checks. This consistency not only improves product quality but also supports faster throughput in automated systems.

In summary, the Keyence GT-A22L Low-Stress Air Push Sensor Head combines delicate handling with high precision and robust design. With its 22 mm measuring range, 8 µm repeatability, 0.35 N measuring force, and lightweight 180 g build, it provides a reliable and efficient solution for inspecting sensitive or precision components in today’s advanced industrial environments.