Mean traquency measurer

A measuring device of a medium frequency of a pulse flow is designed with a view to expand a frequency range to be measured. This is ensured by connecting a photoresistor of an optical-electronic instrument in parallel with a discharge integrator resistor. A light source of the optical-electronic instrument is connected in series with a dosing element to its charge circuit. The measuring device consists of a pulse former, dosing element, integrator, optical-electronic instrument photoresistor and its light source. The device ensures a required measuring accuracy of the medium frequency with a variable time constant. The measuring device is of advantage for its simple circuit, high reliability in operation and low cost