Resistance thermometers, also called resistance temperature detectors (RTDs), are sensors used to measure temperature. Many RTD elements consist of a length of fine wire wrapped around a ceramic or glass core but other constructions are also used. The RTD wire is a pure material, typically platinum, nickel, or copper.
Key Features
High accuracy and excellent repeatability
Stable resistance–temperature relationship
Available in platinum, nickel, or copper elements
Wide operating temperature range
Long-term stability and low drift
Compatible with 2-wire, 3-wire, and 4-wire configurations