RTD Wiring: 2-Wire, 3-Wire & 4-Wire Explained (2026)
RTD wiring field guide — why 2-wire adds 8 °C error, how 3-wire cancels lead resistance via Wheatstone, when to use 4-wire Kelvin. Color codes + diagnostics.
RTD wiring field guide — why 2-wire adds 8 °C error, how 3-wire cancels lead resistance via Wheatstone, when to use 4-wire Kelvin. Color codes + diagnostics.
Cold junction compensation explained: what it is, 5 methods, real error budget for Type K, and the 3 field failure modes nobody documents.
RTD vs thermocouple — compare accuracy, range, response speed, wiring, drift, and cost. Learn the 500°C rule engineers use to pick the right sensor.
You need to replace a thermocouple — or spec one for a new line — and the catalog shows eight letters. K, J, T, E, N, S, R, B. Each has a different alloy pair, a different temperature ceiling, and a different set of environments where it thrives or fails. Thermocouples are one of several…