Abstract: This plug (200) is intended to interact with a mating connector or other female connection element comprising a tubular housing (103) provided with two diametrically opposite studs (109) for engaging and locking. According to the invention, the plug comprises: an elongate central body (210) accommodating the fiber termination (211, 212) with a cylindrical region (250) whose external section corresponds with the internal section of the housing of the mating connection, and two elastically deformable arms (220), each connected by one (222) of their ends to a rear region (218) of the central body and extending in along the central body substantially parallel to the general axis of the latter and toward the respective studs of the mating connector, the free end (223) of each arm each carrying a flange (230) provided, on its face turned toward the central body, with a cavity (231) of cross-section at least partially corresponding with the external section of the respective stud of the mating connector.

Abstract: A flowmeter-volumeter of the type which counts the revolutions of a mobile body in a revolution channel into which open a fluid inlet passage and a fluid exhaust passage. The device includes a first flange grooved with a revolution groove which is a first portion of the channel and grooved with one of both said passages, and a second flange grooved with a revolution groove which is a second portion of the channel and grooved with the other one one of the passages. Both flanges are connected by fastening means arranged for allowing a rotation displacement relative to each other, in order to be able to adjust the distance between the openings through which both passages open into the channel. The device is used to measure flow of a fluid.