What is the Difference Between 2-, 3-, and 4-Wire RTD Sensors?
This article explores 2-, 3-, and 4-wire configurations for resistance temperature detectors (RTDs), focusing on how environmental factors, accuracy requirements, cost, and wire configuration affect selection. The 4-wire configuration is complex but offers the highest accuracy, while the 2-wire configuration has advantages in lower-accuracy applications. Choosing a configuration requires a combination of application requirements and practical conditions.