The device for comparing a male connection element (5) with a female connection element (1) comprises switches (9) comprising two contact zones, at least one of which is carried by an elastic member (11) arranged so that during an introduction of the male connection element in the female connection element the switches are in a different open or closed state depending on whether the male connection element (5) is exactly complementary to the element of female connection (1) or is different from it.
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