An Electric Pulse Hydride Injector (EPHI) designed for safe interim tritium storage has been developed for the dosed supply of hydrogen isotopes in a time interval ranging from several milliseconds up to hundreds of seconds. The release of gas occurs via current pulses through the active elements of the EPHI, each of which is made of a thin molybdenum foil coated on both sides with a thin titanium powder layer. The pulses are generated by a twenty sector current source. With this source the foils can be heated individually or in groups. In this way it is possible to release a wide spectrum of hydrogen quantities. The shape, height and length of the current pulses can be varied as required to release a predetermined amount of hydrogen. An extensive parametric study on the performance of the injector has been carried out in the laboratory. The data obtained have been used for the development of a model that satisfactorily describes the injector operation.