This part of IEC 60761 is applicable to equipment intended for simultaneous, delayed or descrete sequential measurement of radioactive iodine in all forms. When the effluent is sampled for measurement, iodine bound on aerosols is generally collected on a prefilter which should be analyzed separately in a laboratory to provide a complete measurement.It is applicable to equipment designed to fulfill the following functions:- the measurement of the volumic activity of iodine and compounds of radioactive iodine in gaseous effluents or of the released iodine total activity;- the actuation of an alarm signal when either a predetermined concentration or a predeter