Constructed with a low-friction ball bearing. Can be used to measure acceleration rate, velocity, distance traveled and time-traveled. Develop your own sensors and interface box. Wheel measures 2 in. in diameter. Rod measures 6 in. long. Mounting assembly has an area for placing a PC Board that measures 1.2 in. x 0.4 in. , several holes for LEDS, Opto sensors and passing cables. Requires assembly.
