Abstract
A fast-response chromel-alumel (and chromel-constantan) microthermocouple is described and its dynamic characteristics are measured. The microthermocouple features a microdisk junction 0.08 mm in diameter and 2.5 μm thick. Its time constant in turbulent flow of liquid Refrigerant-113 (a poor heat conductor) is measured to be ∼4.6 ms. This time constant was reduced to ∼3.4 ms with a phase-lead compensation circuit. It was possible to distinguish between vapor and liquid phase temperatures in turbulent subcooled boiling flow of Refrigerant-113 with the compensated microthermocouple.
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CITATION STYLE
Beckman, P., Roy, R. P., Whitfield, K., & Hasan, A. (1993). A fast-response microthermocouple. Review of Scientific Instruments, 64(10), 2947–2951. https://doi.org/10.1063/1.1144389
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