A method of placing several sensors of one or more physico-chemical parameters of a fluid, said method comprising: - a determination of a set of positions in a fluid transport network, said determination comprising the steps of a computer-implemented method comprising the following steps: - obtaining, for at least one set of input parameters, simulated values of physico-chemical quantities at a set of points of a fluid transport network for a set of time steps; - obtaining a plurality of candidate sets of positions in the network of a plurality of sensors for one or more physico-chemical parameters of the fluid; - iteratively, until a stop criterion is validated: ○ obtaining, for each candidate set of positions, a performance score at least from the simulated values of physico-chemical quantities at the positions of the plurality of sensors; ○ modifying the plurality of candidate sets of sensor positions, said modifying comprising at least one operation selected from: ■ retaining at least one candidate set of positions with a most favourable score; ■ adding at least one candidate set of sensor positions defined by a combination of the positions of at least two candidate sets; ■ adding at least one candidate set of sensor positions defined by modifying a position of a sensor in a candidate set; - selection of the candidate set of positions with the most favourable score. - placing said sensors in said set of positions - a determination of a set of positions in a fluid transport network, said determination comprising the steps of a computer-implemented method comprising the following steps: - obtaining, for at least one set of input parameters, simulated values of physico-chemical quantities at a set of points of a fluid transport network for a set of time steps; - obtaining a plurality of candidate sets of positions in the network of a plurality of sensors for one or more physico-chemical parameters of the fluid; - iteratively, until a stop criterion is validated: ○ obtaining, for each candidate set of positions, a performance score at least from the simulated values of physico-chemical quantities at the positions of the plurality of sensors; ○ modifying the plurality of candidate sets of sensor positions, said modifying comprising at least one operation selected from: ■ retaining at least one candidate set of positions with a most favourable score; ■ adding at least one candidate set of sensor positions defined by a combination of the positions of at least two candidate sets; ■ adding at least one candidate set of sensor positions defined by modifying a position of a sensor in a candidate set; - selection of the candidate set of positions with the most favourable score. - obtaining, for at least one set of input parameters, simulated values of physico-chemical quantities at a set of points of a fluid transport network for a set of time steps; - obtaining a plurality of candidate sets of positions in the network of a plurality of sensors for one or more physico-chemical parameters of the fluid; - iteratively, until a stop criterion is validated: ○ obtaining, for each candidate set of positions, a performance score at least from the simulated values of physico-chemical quantities at the positions of the plurality of sensors; ○ modifying the plurality of candidate sets of sensor positions, said modifying comprising at least one operation selected from: ■ retaining at least one candidate set of positions with a most favourable score; ■ adding at least one candidate set of sensor positions defined by a combination of the positions of at least two candidate sets; ■ adding at least one candidate set of sensor positions defined by modifying a position of a sensor in a candidate set; ○ obtaining, for each candidate set of positions, a performance score at least from the simulated values of physico-chemical quantities at the positions of the plurality of sensors; ○ modifying the plurality of candidate sets of sensor positions, said modifying comprising at least one operation selected from: ■ retaining at least one candidate set of positions with a most favourable score; ■ adding at least one candidate set of sensor positions defined by a combination of the positions of at least two candidate sets; ■ adding at least one candidate set of sensor positions defined by modifying a position of a sensor in a candidate set; ■ retaining at least one candidate set of positions with a most favourable score; ■ adding at least one candidate set of sensor positions defined by a combination of the positions of at least two candidate sets; ■ adding at least one candidate set of sensor positions defined by modifying a position of a sensor in a candidate set; - selection of the candidate set of positions with the most favourable score. - placing said sensors in said set of positions