For the measurement of speed and acceleration. It operates on 12V AC and is safe for students. Paper tape, drawn through guides, is struck by a dotting screw carried on the armature. On wooden base with 4 mm sockets. Includes one roll of tape and 12 carbon discs.
Timer ac.input 220v ac,output 12v ac.Roll of paper tape width approx.10mm pack of 48 discs.