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Figure 4.
Circuit diagram of constant temperature measuring system, R1, R2, and R3 are wire-wound resistors with 1% tolerance, ±20 ppm/°C temperature coefficient. Rs is a resistive temperature detector (RTD).
Tangwongsan et al. BioMedical Engineering OnLine 2006 5:57 doi:10.1186/1475-925X-5-57
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