Testing a solar-blind pyrometer Ballestrín, Jesús Marzo Rosa, Aitor Cañadas, Inmaculada Rodríguez, José Pyrometer Surface temperatures are key parameters in many concentrated solar radiation applications. Pyrometric temperature measurement of solar irradiated material surfaces is the alternative to contact measurement techniques, which are inadequate for measuring the temperatures of such surfaces. However, reflected solar radiation is an important uncertainty variable in this non-contact methodology. A promising method for eliminating this solar perturbation is by using centred passband filters on the atmospheric solar absorption bands, creating solar-blind pyrometric systems. A commercial pyrometer has been tested in the wavelength band at around 1.4 µm in the solar furnace at Plataforma Solar de Almería, showing its advantages and limitations. An estimation of temperature measurement uncertainty for a real case is presented with theory and experiment in agreement: the higher the temperature, the lower the uncertainty. Another experiment has shown that the pyrometer measures temperature properly even through quartz windows in this spectral range. 2026-01-13T08:03:02Z 2026-01-13T08:03:02Z 2010 journal article Ballestrín, J., Marzo, A., Cañadas, I. and Rodríguez, J., (2010) Testing a solar-blind pyrometer. Metrologia 10/2010, 47(6):646. doi: https://doi.org/10.1088/0026-1394/47/6/003 0026-1394 1681-7575 https://hdl.handle.net/10481/109583 10.1088/0026-1394/47/6/003 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional IOP Publishing