A feasibility study has been conducted on the use of laser-Raman spectroscopy as a remote temperature sensing technique for liquids. Empirical relations between the temperature and parameters describing Raman band intensities were determined over a temperature range of 15 to 65 °C in carbon tetrachloride, benzene, ethylene glycol, aqueous sodium nitrate (5 M), and water. Using a 2-W argon ion laser and two 0.25-m monochromators in tandem, it was possible to measure temperatures in water to within 2 °C and, in ethylene glycol, to within 4 °C.
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Pan, Y., Faw, R.E. & Lester, T.W. Laser-Raman remote temperature sensing in liquids. Experiments in Fluids 2, 81–88 (1984). https://doi.org/10.1007/BF00261326
- Ethylene Glycol