RTDs (Resistance Temperature Detectors) use a platinum wire element whose resistance changes linearly with temperature — providing the highest accuracy and long-term stability of any passive temperature sensor, making them the standard choice for laboratory instruments, industrial process control (chemical plants, refineries), HVAC air-handling units, and medical sterilizers where ±0.1°C accuracy is required. Our RTD inventory covers PT100 (100Ω), PT500, and PT1000 (1000Ω) elements in 2-wire, 3-wire, and 4-wire configurations, in both thin-film (SMD) and wire-wound (ceramic/tube) constructions from Heraeus, Vishay, Omega Engineering, TE Connectivity, and Minco — with accuracy classes of ±0.1°C to ±0.5°C and temperature ranges from –200°C to +600°C.
Precision PT100 and PT1000 elements in 4-wire configurations and ceramic-tube housings for high-temperature industrial applications are frequently long lead-time items. Welllinkchips stocks common RTD configurations and can source discontinued PT100/PT1000 types needed for calibration reference equipment and legacy process instrumentation.
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