Use the 7 modes of operation for measuring time (0 to 999.9 s) or counting cycles (0 to 9,999 cycles). Timer captures the time elapsed as an object travels through 1 photogate, between multiple objects passing through 1 photogate, and as an object passes from 1 photogate to the other. Timer stores up to 20 consecutive data points. Includes 2 photogates and instructions.