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Fluoroptic temperature sensors work on the principle of _______(a) thermistor(b) thermocouple(c) optical fiber(d) rtdI got this question in a national level competition.I would like to ask this question from Biosensors in portion Physiological Transducers of Biomedical Instrumentation

Answer»

Correct choice is (c) optical fiber

To explain: Fluoroptic temperature sensors work on the principle of optical fiber sensors. They contain a rare earth phosphor which is illuminated by a white light along a short LENGTH of LARGE core optical FIBRE. The light excites the phosphor which emits a number of lines. By using filters, two of these lines at 540 and 630 nm are SELECTED, and the ratio of their intensities is a single valued FUNCTION of the temperature of the phosphor.



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