Available. The Keyence GT2-A50 is a high-precision digital contact sensor head designed for air cylinder applications. It features a quartz glass scale and CMOS image sensor projection system, providing an absolute measurement type without tracking errors. The sensor offers a measuring range of 50 mm with a resolution of 0.5 μm and an indicated accuracy of 3.5 µm (p-p). It operates with a sampling cycle of 1 ms and includes a two-color LED (red, green) for operation indication. The sensor head is constructed with a zinc die-cast main body case, aluminum alloy cylinder part, polyacetal air joint resin part, brass nickel-plated air joint metal part, and a polyarylate indicator. The dust boot is made of NBR, and the contact is composed of TYPE304 and 440C stainless steel. The sensor head cable is optional and connects to the M8 connector. The weight of the sensor head is approximately 405 g (excluding cable).