A position detector (12; 212; 412) for a movable fitting, the movable fitting being carried by an edge (5; 6) belonging to a leaf or to a frame of a casing, such as a door, a window or a shutter, the detector comprising: • a housing, which comprises two longitudinal ends (101, 102), crossed by a longitudinal axis of the housing; • a rod, which passes through a first longitudinal end of the two longitudinal ends (101, 102), which comprises a sensing end, extending outside the housing, and an inner end, extending inside the housing the sensing end being traversed by the longitudinal axis, so that the rod can be displaced in translation with respect to the housing along the longitudinal axis by the action of the movable fitting on the sensing end; and • electronic means, which comprise: ◆ a sensor system (57, 98, 99) generating position information as a function of the translational position of the rod relative to the housing, and ◆ a transmitter for transmitting the position information, characterised in that the detector (12; 212; 412) further comprises at least one jumper (27, 27'; 227; 427), which comprises: • a fixing lug (29; 229; 429), by means of which the at least one jumper (27, 27'; 227; 427) can be fixed to the edge (5; 6), the fixing lug (29; 229; 429) being offset with respect to the longitudinal axis, parallel to a transverse axis of the housing; and • a bridge (28; 228; 428), extending from the fixing lug, said at least one jumper (27, 27'; 227; 427) being designed to adopt a holding configuration, wherein, while said at least one jumper (27, 27'; 227; 427) is attached to the edge (5; 6) by the fixing lug (29; 229; 429), one of the longitudinal ends (101, 102) of the housing is immobilised between the bridge (28; 228; 428) and the edge (5; 6), so that the housing is held bound with the edge (5; 6) by said at least one jumper (27, 27'; 229; 429). • a housing, which comprises two longitudinal ends (101, 102), crossed by a longitudinal axis of the housing; • a rod, which passes through a first longitudinal end of the two longitudinal ends (101, 102), which comprises a sensing end, extending outside the housing, and an inner end, extending inside the housing the sensing end being traversed by the longitudinal axis, so that the rod can be displaced in translation with respect to the housing along the longitudinal axis by the action of the movable fitting on the sensing end; and • electronic means, which comprise: ◆ a sensor system (57, 98, 99) generating position information as a function of the translational position of the rod relative to the housing, and ◆ a transmitter for transmitting the position information, ◆ a sensor system (57, 98, 99) generating position information as a function of the translational position of the rod relative to the housing, and ◆ a transmitter for transmitting the position information, • a fixing lug (29; 229; 429), by means of which the at least one jumper (27, 27'; 227; 427) can be fixed to the edge (5; 6), the fixing lug (29; 229; 429) being offset with respect to the longitudinal axis, parallel to a transverse axis of the housing; and • a bridge (28; 228; 428), extending from the fixing lug, said at least one jumper (27, 27'; 227; 427) being designed to adopt a holding configuration, wherein, while said at least one jumper (27, 27'; 227; 427) is attached to the edge (5; 6) by the fixing lug (29; 229; 429), one of the longitudinal ends (101, 102) of the housing is immobilised between the bridge (28; 228; 428) and the edge (5; 6), so that the housing is held bound with the edge (5; 6) by said at least one jumper (27, 27'; 229; 429).