In the framework of QuantiAGREMI project, one of the main objectives aims to develop new measurement techniques i/ to quantify NH3 emission fluxes from livestock housings, with a target uncertainty between 20 % to 40% for naturally or mechanically ventilated housing, and ii/ to monitor NH3 concentrations in ambient air around livestock facilities to enhance spatiotemporal coverage in considering atmospheric conditions and sources. Recently many low-cost sensors for massive deployment have been developed and may have the potential to densify measurements on several farms and thus increase the representativeness of measurement data. With regard to NH3 sensors, previous work has highlighted the need for accurate calibration and validation. In addition, measurements under livestock housing conditions for low-cost NH3 sensors show that the results compared to the EMEP reference denuder method appear promising in the range >1 µmol/mol, but so far do not have the required accuracy for concentrations below. Thus, they cannot be used in naturally ventilated cattle housings with very low concentrations. For several years, IMT Nord Europe has been interested in the development of surfaces sensitive to gaseous NH3. The transduction is based on a conducting polymer layer showing a resistive variation in presence of this pollutant. In contrast with the majority of commercial sensors based on electrochemical or chemoresistive (MOX) techniques, the sensitive material developed at IMT Nord Europe enables a detection limit around few nmol/mol of NH3, shows low interferences for other gases found around livestock buildings such as H2S or NO2. As a partner in the project, we are responsible for integrating this sensitive element to propose an autonomous measurement system and to optimise it to meet QuantiAGREMI requirements in all expected conditions (i.e. inside vs. outside buildings; emission vs. immission monitoring).