A single-relay scale of two counting unit
Corbett Bd · Journal of Scientific Instruments · 1952
acid and distilled water.Before being used for the first time the electrolyte must be thoroughly saturated with gas by passing current through the solution for 15-20 min.The range of the instrument can be varied easily by changing the tube for one of a different diameter but, since in radiotherapy total doses in single irradiations usually lie between 100 r and 500 r, one instrument is usually adequate for all Since this instrument was put into use the author's attention has been drawn to a paper by Montgomery and Montgomery* in which a rather similar device is described for indicating the total number of pufses registered by a Geiger-counter circuit.