The ALPS RDC506002A is an industrial motion and position sensor with 10K ohm ( +-2% linearity ) 4mm diameter. It features a ceramic element design which is resistant to temperature, vibration, and shock, and its metal casing allows for reliable and robust sensing performance. It's designed for use in automated manufacturing and agriculture settings, allowing users to monitor the speed and accuracy of their machinery and robots, as well as providing feedback on position of parts and components in production lines. The device is easily installable by directly mounting to surfaces using screws.