This solid-state chronotron measures the relative time delay between two shaped photomultiplier pulses, and quantizes this time delay into seven time intervals with widths of 3 to 7 nsec. These intervals represent the difference in time of flight of two particles in a large scattering experiment, and may be varied at will by charging front panel cables. The quantized time delay is then stored in a buffer storage until readout, at which time the system is recycled. Because the chronotron was used with a system having a 40-μsec cycle time, a maximum repetition rate of 100 kc/s was selected. However, this rate could be increased considerably if necessary. The time intervals are formed by splitting the two shaped photomultiplier signals into parallel diode coincidence circuits, with the time delay of each coincidence circuit set for the center of its respective time interval. Since the coincidence circuits are identical, both the position and width of each time interval are determined only by the delay cables. Thus the coincidence circuit with the greatest output voltage indicates the correct time interval. To detect this voltage the stretched output of each coincidence circuit has a common ramp voltage added to it, and together these signals begin driving a bank of blocking oscillators. As soon as one blocking oscillator triggers, all others are disabled and the blocking oscillator that triggered sets up its binary coded number in the buffer storage. As the ramp generator always insures that one blocking oscillator triggers there is never a hole between time intervals, even if the edges of the intervals drift, because when one interval expands its neighbors will contract. Long-term stability of the time interval centers is a few tenths of a nanosecond, and the 24-hr stability of the edges of the intervals is ±0.5 nsec. With the aid of a TV monitor used in checking the system, the chronotron can be held within the above limits indefinitely by simple daily adjustments.