Table 2 Summary of advisable and not advisable practices

To finalise the purpose of the microclimate monitoring

To start a microclimate monitoring without a clear purpose

To define the appropriate climate variables to record in relation with the material of the preserved artworks

To collect arbitrary climate variables without any relation to the material of artworks

To choose sensors with features recommended by the European standards

To choose sensors with poor features (e.g., high uncertainty), not calibrated, and with low performance

To carry out the calibration of sensors with a reference instrument or compare all sensors among them before starting a monitoring campaign, to guarantee the comparability and reliability of recorded data

To use sensors with different metrological features and inconsistent time response

To install sensors in sampling points representative of real conditions

To deploy sensors close to disturbing climate factors, or local constraints or obstacles

To evaluate indoor signal propagation of wireless sensing system

To deploy sensors close to heavy masonries, underground rooms, etc. without first checking the correct data transmission in that area

To reduce the visual impact

To deploy sensors along visitors’ passageways