This sensor can detect the presence of a highly reflective object at 10cm, for less reflective objects (like hands) the distance is about 5cm. Includes 24" Phidget sensor cable. This product is part of the Phidgets family! Phidgets are an easy to use set of USB-based building blocks for low cost sensing and control from your PC. A wide array of sensors, I/O devices, and controllers are available. To view the entire Phidgets product line, follow this link. Getting Started with...