A small calibrator has been constructed to facilitate wide-band liquid crystal temperature measurements on complex, curved surfaces. The calibrator’s size, 21.3 mm by 20.3 mm by 10.0 mm thick, makes it ideal for in-situ calibrations at multiple sites on curved surfaces. Its design utilizes the heating/cooling ability of a thermoelectric cooler, and its temperature is quickly and accurately controlled by computer. To test the calibrator’s accuracy, a liquid crystal sample was calibrated. Subsequent comparisons to thermistor measurements of a uniform temperature copper block painted with liquid crystals showed the calibration to be accurate to +/−0.1°C between the red start and the approximate blue start temperatures, and the maximum error was less than +/−0.3°C in the dark blue/violet region.
A Novel Mini Calibrator for Thermochromic Liquid Crystals
Contributed by the Heat Transfer Division for publication in the Journal of Heat Transfer. Manuscript received by the Heat Transfer Division December 14, 1999; revision received November 21, 2000. Associate Editor: A. Majumdar.
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Elkins , C. J., Fessler , J., and Eaton , J. K. (November 21, 2000). "A Novel Mini Calibrator for Thermochromic Liquid Crystals ." ASME. J. Heat Transfer. June 2001; 123(3): 604–607. https://doi.org/10.1115/1.1370505
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