A device (12) for generating an unlocking criterion (10b) for a detonator (8) for a partially swirling ammunition (2) with the first part (4a) with swirl (D) and second part (4b) without or with less swirl (D) , contains a sensor (14) for outputting a parameter (K) for a relative rotation (R) between the first (4a) and second part (4b) and a control unit (16) for generating the unlocking criterion (10b) if the parameter (K) The device (12) according to the invention for providing the or one of the unlocking criteria contains an igniter (8) for the partially rotating ammunition (2) which has at least one unlocking criterion (10a, 10b). 2) contains a device (12) according to the invention.
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