Seal of generally annular shape, comprising at least a portion of a deformable material having a sealing function, at least one sensor which is incorporated into the portion of deformable material having a sealing function, and connection means, such that the sensor is arranged to perform at least one measurement while the seal is in use, and the connection means are arranged to transmit at least one measurement result to a monitoring or recording unit, characterized in that two sensors are provided in the seal of generally annular shape, each of the sensors being adhered to the deformable material having a sealing function inside the seal, the deformable material having a sealing function comprising a first elastomer, and in that, for each sensor among said two sensors, at least a portion of a fabric (4, 5) impregnated with a second elastomer is arranged between the sensor and the deformable material having a sealing function, each surface of the sensor among two opposite surfaces of this sensor being adhered to the deformable material having a sealing function, by means of a stack which comprises: - a film of an adhesion primer (6, 8), which covers at least a portion of the surface of the sensor while being in contact with said surface of the sensor; - the portion of fabric (4, 5) impregnated with the second elastomer, which covers the film of the adhesion primer (6, 8) while being in contact with this film of the adhesion primer; and - another film of the adhesion primer (7, 9), which is located between the portion of fabric (4, 5) impregnated with the second elastomer and the deformable material having a sealing function, while being in contact with said portion of fabric impregnated with the second elastomer and with said deformable material having a sealing function. characterized in that two sensors are provided in the seal of generally annular shape, each of the sensors being adhered to the deformable material having a sealing function inside the seal, the deformable material having a sealing function comprising a first elastomer, and in that, for each sensor among said two sensors, at least a portion of a fabric (4, 5) impregnated with a second elastomer is arranged between the sensor and the deformable material having a sealing function, each surface of the sensor among two opposite surfaces of this sensor being adhered to the deformable material having a sealing function, by means of a stack which comprises: - a film of an adhesion primer (6, 8), which covers at least a portion of the surface of the sensor while being in contact with said surface of the sensor; - the portion of fabric (4, 5) impregnated with the second elastomer, which covers the film of the adhesion primer (6, 8) while being in contact with this film of the adhesion primer; and - another film of the adhesion primer (7, 9), which is located between the portion of fabric (4, 5) impregnated with the second elastomer and the deformable material having a sealing function, while being in contact with said portion of fabric impregnated with the second elastomer and with said deformable material having a sealing function. - a film of an adhesion primer (6, 8), which covers at least a portion of the surface of the sensor while being in contact with said surface of the sensor; - the portion of fabric (4, 5) impregnated with the second elastomer, which covers the film of the adhesion primer (6, 8) while being in contact with this film of the adhesion primer; and - another film of the adhesion primer (7, 9), which is located between the portion of fabric (4, 5) impregnated with the second elastomer and the deformable material having a sealing function, while being in contact with said portion of fabric impregnated with the second elastomer and with said deformable material having a sealing function.