白金電阻溫度感測器 (RTD)是在 0 °C 時具有 100 歐姆典型電阻的裝置。會依據溫度產生變化，白金電阻溫度計是利用溫度變化造成電阻改變的材料做成的溫度感應器，使用的材料為鉑。結構上是將白金測溫電阻體包在不鏽鋼的保護管內，作成完全防水型式。

The Platinum Resistance Temperature Detector (RTD) is a device that has a typical resistance of 100 ohms at 0 °C. It responds to temperature changes by varying its resistance. The platinum resistance thermometer is made from materials that change resistance with temperature, specifically using platinum. Structurally, the platinum temperature sensing element is housed within a stainless steel protective tube, making it fully waterproof.