## 2 Research Subject
### Technological Characterization and Environmental Standards
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Code** & \begin{tabular}{c} **Type Model—** \\ **Manufacturer** \\ \end{tabular} & **Designation** & **Accuracy** \\ \hline \multirow{3}{*}{1A} & & 16-channel logger with eight I/O & \\  & CR1000X—Campbell Scientific & ports, complete with 4G router for & \\  & remote control, two ethernet ports, & \\  & and Wi-Fi capabilities & & \\ \hline \multirow{3}{*}{1B} & & Basic six-channel logger with two & \\  & CR300\_422—Campbell & I/O ports, integrated RF422 radio & \\  & Scientific & remote communication, complete & \\  & with antenna & & \\ \hline \multirow{3}{*}{1C} & HFP01—Hukseflux & Heat flux plates & \(\pm\)3\% (k = 2, standard ISO 17025) \\ \hline \multirow{3}{*}{1D} & \begin{tabular}{c} HygroVUE10\_35M— \\ Campbell Scientific \\ \end{tabular} & \begin{tabular}{c} Air thermo-hygrometer. Complete \\ with one spare sensitive element \\ \end{tabular} & \(\pm\)0.1 \({}^{\circ}\)C \\ \hline \multirow{3}{*}{1E} & RAD10—Campbell Scientific & \begin{tabular}{c} Protection for thermo-hygrometer, \\ naturally ventilated multi-plate type \\ \end{tabular} & - \\ \hline \multirow{3}{*}{1F} & \multirow{3}{*}{LPPYRA10—Delta OHM} & \begin{tabular}{c} Spectrally flat class A (secondary \\ standard) pyranometer according to \\ ISO 9060:2018 [58] \\ \end{tabular} & \(\pm\)0.5\% \\ \hline \multirow{3}{*}{1G} & \begin{tabular}{c} WindSonic\_op1—Gill \\ distributed by Campbell \\ Scientific \\ \end{tabular} & \begin{tabular}{c} 2D sonic anemometer with \\ RS232 interface \\ \end{tabular} & \(\pm\)2\% of reading at 12 m/s \\ \hline \multirow{3}{*}{2A–2B} & \multirow{3}{*}{NR01—Hukseflux} & \
\begin{tabular}{c} Net radiometer with four elements \\ (two global radiation and two \\ infrared radiation) \\ \end{tabular} & \(\pm\)2.4\% \\ \cline{1-1}  & &
\begin{tabular}{c} Software for the comprehensive \\ management of Campbell \\ Scientific loggers \\ \end{tabular} & - \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Sensors used for monitoring environmental determinants—\(\copyright\) authors. Figure 7: Typical section of the tunnel building selected as case study, highlighting the construction technology employed—\(\copyright\) authors. The meteorological sensors for wind speed, air temperature, and relative humidity were mounted on a metal tower positioned at a distance of approximately 3 m from the closest poultry tunnel. Although the proximity to the structures may introduce some localized disturbances--such as partial wind deflection or shading effects--this location was the only available open space on the property that met basic installation safety and accessibility requirements. The sensors were installed at a height of 1.5 m above ground level, consistent with recommendations from the World Meteorological Organization (WMO) and standard agronomic practices for microclimate monitoring in agricultural environments [59]. While minor gap effects cannot be completely ruled out, the open corridor between the buildings (14 m wide) and the unobstructed vertical clearance at the tower's position ensured a reasonable degree of representativeness of ambient outdoor conditions relevant to the operational environment of the poultry tunnels.