device for measuring speed and acceleration of a moving
body. Because it is synchronized directly to the AC line
frequency, the striker oscillations are as accurate as the
input signal. The AC timer does not have to be calibrated
as a function of input voltage to rotational motor speed. It conveniently plugs into any 120V AC outlet and is safely
insulated with high-impact plastic.
Instructions, carbon paper discs, and a roll of recording
tape are included.
SPECIFICATIONS: Input: 120 VAC 50/60 HZ. Output
timing frequency: Fixed 50 or 60 HZ dependent on line