I have a Digital Timer With Photogates. I recently acquired it from my local high school science department. I have tried researching it online but to no avail. Pacific Science Supplies, Inc 1998 Model P64311 It's lacking in details. The digital timer with photgates is designed to be used with air tracks, free fall aparatus and other equipment to record counts, time intervals, periods of oscillation, velocities, acceleration, eitc in physic experiments. It came with the Digital Timer (a big heavy box that looks expensive) and two photogates. I have hooked it up and it works. I was just wondering if anyone could tell me more about it and what I should do with it. Wouldn't mind knowing what its worth.