When it comes to RTDs (Resistance Temperature Detectors), wire configuration matters.
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2-wire RTD: Simplest, but affected by lead wire resistance.
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3-wire RTD: Most commonly used; compensates for lead resistance assuming all wires are equal.
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4-wire RTD: Most accurate; eliminates lead wire resistance entirely using a full Wheatstone bridge.
Choosing the right configuration depends on your accuracy needs, distance from transmitter, and budget.