Digital Timer With Photogates, 1 Each

The Digital Timer With Photogates by United Scientific is a four-digit, microprocessor-controlled timer for classroom mechanics labs. Eight programmed functions cover counts, interruption timing, period of oscillation, acceleration, acceleration due to gravity, and velocity in collisions, and the timer ships with two photogates and an activity guide. High school and introductory college physics teachers use it with air tracks and free fall apparatus.