Spark Timer

Compact design with low-friction, adjustable needle pressure for sharp, accurate readouts. Timer is equipped with 10-Hz and 60-Hz settings that provide clear print, even for a relatively slow-moving dynamic cart. Unit may also be used in a vertical position for falling body experiments. Operates on 120-V AC. Timer comes with 1 roll of recording tape, padded clamp for attaching timer to table top, and instructions. Size, 3-1/2 x 3-3/4 x 1-1/2".