RTDanturi

RTDanturi is the Finnish term for a resistance temperature detector (RTD), a temperature sensor that measures temperature by detecting changes in the electrical resistance of a metal, most commonly platinum. The sensing element is typically a Pt100 or Pt1000 device, which may be a wire-wound or thin-film element enclosed in a protective sheath.

RTDanturi sensors are offered in 2-, 3-, or 4-wire configurations to compensate for lead resistance and improve accuracy. They are specified with IEC 60751 accuracy classes, commonly Class A or Class B, with tolerances that vary with temperature. Platinum-based RTDs provide wide operating ranges and high stability, generally from about -200°C up to 850°C depending on the element and sheath. They are favored for good linearity and repeatability, though performance depends on installation, calibration, and the quality of the electrical connections.

In practice, RTDantsuri devices are used in industrial process control, HVAC systems, laboratory instrumentation, and other applications requiring precise temperature measurement. They are typically interfaced with RTD transmitters, data loggers, or programmable logic controllers (PLCs). Advantages include high accuracy, long-term stability, and repeatable measurements; disadvantages can include higher cost, slower response times compared with some thermocouples, and greater fragility in certain configurations. Proper installation, wiring, and periodic calibration are important to maintain traceable and reliable measurements.

Related topics include Pt100 and Pt1000 sensors, IEC 60751 standards, and comparisons with thermocouples and thermistors.