Studio pilota per la valutazione di una procedura per la taratura di termometri misuratori della temperatura dell’aria.

This EURAMET project includes two main activities:  Perform a pilot study (in the form of an interlaboratory comparison) to explore issues around calibration in air of temperature sensors;  Feed into a guidance document the findings from the pilot study. Background and need for the project Air temperature is measured for a multitude of purposes. Atmospheric air temperature is the key variable in indoor climatisation, in meteorological observations and climate studies. It is also critical to precision dimensional and mass measurements. Understanding and fully evaluating measurement uncertainty for air temperature measurements is an open scientific and technical issue now motivating research efforts and discussion both at the CIPM CCT and in WMO expert teams. While calibration of temperature sensors in liquid is well characterised, the calibration of thermometers in air still requires definition of procedures and guidelines. The problem of the lack of a guide for the calibration of thermometers in air was underlined at the EURAMET TC-T meeting of 2017 as a result of a specific scientific workshop on the matter. The analysis of the air temperature measurement procedures and uncertainty evaluation, including the aspects and contributions due to the calibration of sensors is also a task of the CCT Working Group on Environment and is included in the strategy roadmap of CCT.