TEMPERATURE SENSING APPARATUS

摘要

Temperature sensing apparatus comprises a source of electromagnetic radiatio n (1), a wavelength-selective element (3) which interacts with radiation emitt ed from the source (1) and a detection system (6) which monitors radiation from the wavelength-selective element (3). The wavelength-selective element (3) i s fixedly mounted on a substantially rigid substrate (not shown). The apparatu s can be used for temperature sensing in aquatic environments.