Device for measuring at least one physical, chemical or biological parameter of a fluid in particular water or gas, flowing in a pipe belonging to a fluid distribution network, said device being intended to be installed as cutoff on said pipe at the point of delivery of the fluid, said pipe comprising a first section and a second section, said device comprising: - at least one sensor (11, 12) provided with a measurement end; - a body comprising an opening forming a flow pipe and at least one insertion housing (31, 32, 33) configured to receive said measurement end of the at least one sensor (11, 12), the insertion housing (31, 32, 33) emerging in the flow pipe; - fixing means (221, 222) configured to connect: o a first end of the flow pipe to an end of the first section, o a second end of the flow pipe to an end of the second section, so as to allow the fluid to flow through the flow pipe; and - a smart module configured to: trigger at least one measurement by the at least one sensor (11, 12) at determined time intervals, and diagnose an anomaly of at least one physical, chemical or biological parameter of the fluid as a function of at least one measured value, characterized in that it comprises further a modular support element comprising orifices aligned with orifices of substantially the same dimensions realized in the flow pipe, these orifices which are insertion housings (31, 32, 33) being arranged to make it possible to position the at least one sensor (11, 12) in such a way that its measurement end is received in at least one of the insertion housings (31, 32, 33), this modular support element comprising fixing means of the at least one sensor (11, 12) capable of holding the at least one sensor in a measurement position in which the at least one sensor (11, 12)is capable of measuring the at least one physical, chemical or biological parameter of the fluid flowing through the flow pipe, each sensor (11, 12) being connected to the smart module by connection to an input/output manager. - at least one sensor (11, 12) provided with a measurement end; - a body comprising an opening forming a flow pipe and at least one insertion housing (31, 32, 33) configured to receive said measurement end of the at least one sensor (11, 12), the insertion housing (31, 32, 33) emerging in the flow pipe; - fixing means (221, 222) configured to connect: o a first end of the flow pipe to an end of the first section, o a second end of the flow pipe to an end of the second section, so as to allow the fluid to flow through the flow pipe; and o a first end of the flow pipe to an end of the first section, o a second end of the flow pipe to an end of the second section, - a smart module configured to: trigger at least one measurement by the at least one sensor (11, 12) at determined time intervals, and diagnose an anomaly of at least one physical, chemical or biological parameter of the fluid as a function of at least one measured value, characterized in that it comprises further a modular support element comprising orifices aligned with orifices of substantially the same dimensions realized in the flow pipe, these orifices which are insertion housings (31, 32, 33) being arranged to make it possible to position the at least one sensor (11, 12) in such a way that its measurement end is received in at least one of the insertion housings (31, 32, 33), this modular support element comprising fixing means of the at least one sensor (11, 12) capable of holding the at least one sensor in a measurement position in which the at least one sensor (11, 12)is capable of measuring the at least one physical, chemical or biological parameter of the fluid flowing through the flow pipe, each sensor (11, 12) being connected to the smart module by connection to an input/output manager. trigger at least one measurement by the at least one sensor (11, 12) at determined time intervals, and diagnose an anomaly of at least one physical, chemical or biological parameter of the fluid as a function of at least one measured value, characterized in that it comprises further a modular support element comprising orifices aligned with orifices of substantially the same dimensions realized in the flow pipe, these orifices which are insertion housings (31, 32, 33) being arranged to make it possible to position the at least one sensor (11, 12) in such a way that its measurement end is received in at least one of the insertion housings (31, 32, 33), this modular support element comprising fixing means of the at least one sensor (11, 12) capable of holding the at least one sensor in a measurement position in which the at least one sensor (11, 12)is capable of measuring the at least one physical, chemical or biological parameter of the fluid flowing through the flow pipe, each sensor (11, 12) being connected to the smart module by connection to an input/output manager.