AC Recording Timer Deluxe

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 frequency.