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Fig. 4. Effect of pulse length on the estimate of rapp. Shown are data from sensors with (a) full-length, 28 mm, temperature probes and (b) shortened, 18 mm, temperature probes. Comparisons are made among sensors constructed from 1.27- and 1.67-mm diam. stainless steel needles mounted in bodies fabricated from high thermal conductivity (HTC) RBC4300 epoxy and low thermal conductivity (LTC) urethane epoxy. Results from the instantaneous pulse (Eq. [1]) and finite pulse (Eq. [2]) models are shown.
