Which of the following is the principle behindFluoroptic temperature sensors working?(a) optical fiber(b) thermistor(c) thermocouple(d) rtdI had been asked this question during an interview.This is a very interesting question from Transmission of Analog Physiological Signals Over Telephone topic in division Biomedical Telemetry of Biomedical Instrumentation

Which of the following is the principle behindFluoroptic temperature s

1.	Which of the following is the principle behindFluoroptic temperature sensors working?(a) optical fiber(b) thermistor(c) thermocouple(d) rtdI had been asked this question during an interview.This is a very interesting question from Transmission of Analog Physiological Signals Over Telephone topic in division Biomedical Telemetry of Biomedical Instrumentation
Answer» Right option is (a) optical FIBER Explanation: They contain a RARE EARTH phosphor which is illuminated by a white light along a short LENGTH of large core optical fibre. Fluoroptic temperature sensors work on the principle of optical fiber sensors.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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