Abstract: Disclosed is a velocity measuring device that utilizes photoelectric sensor rings. A first and second photoelectric sensor ring are spaced a known distance apart. The rings include a repeating pattern of first and second emitters and first and second receivers. The first emitters and the first receivers have a first matched modulation frequency, and the second emitters and second receivers have a second matched modulation frequency. A signal is transmitted between the emitters and receivers, and when an object is passed through the photoelectric sensor rings, the blocking of the signal causes a change in measured voltage. The velocity of the object is calculated by the dividing the known distance by time between voltage changes. The inventive device allows for measuring velocity of small, slow moving objects that cannot be measured utilizing currently known techniques.