1. Monitoring equipment for use with a processing machine to indicate the efficiency of the machine in achieving a desired processing rate comprising, in combination, a housing remote from the machine, electronic clocking means within the housing to generate timing pulses, a presettable control with the housing to determine the rate at which pulses are fed from the clocking means to a computing circuit as a first signal, the presettable control including a manually settable device on which the repetition rate for the first signal can be set digitally, input terminals to the housing connected to the computing circuit to which input terminals can be attached a sensing means associated with the processing machine and which generates second signal pulses at a rate indicative of the performance of the machine in processing, the computing circuit including means to generate a third signal which represents a ratio of the first and second signals and including digital display devices on the housing on which, respectively, a cumulative count of the first and second signals and periodically updated values of the third signal are displayed.