Edu logger data logger sensors edu lab 900 209 this sensor can be used to study various kinds of motion with five modes of operation time velocity or acceleration can be measured with one or two photo gates and associated timing cards as well as showing pictorially the status digital 1 or 0 of the voltage output of the photo gate as timing cards pass through itthe modes of operation are selected by clicking on the relevant picture the measured values can be displayed digitally or grap