Pt100lävi

Pt100lävi is a term you may encounter in Nordic-language texts and vendor literature to describe a Pt100-based temperature sensing assembly. There is no single internationally defined meaning for Pt100lävi, and its precise scope can vary by manufacturer or context. In general, it refers to a Pt100 resistance temperature detector (RTD) or its housing and lead assembly used for temperature measurement.

A Pt100 RTD uses a platinum element with a nominal resistance of 100 ohms at 0°C. The resistance increases with temperature in a predictable, nearly linear fashion, making Pt100 sensors popular for accurate temperature sensing. The platinum element is often enclosed in a protective sheath (such as stainless steel, glass, or ceramic) and connected to measurement electronics via leads or terminals.

Configurations commonly used with Pt100 sensors include 2-wire, 3-wire, and 4-wire arrangements. The extra wires in 3- or 4-wire setups help compensate for resistance in the lead wires, improving accuracy, especially over longer cable runs or in industrial environments. Accuracy classes defined by standards such as IEC 60751 (for Pt100 RTDs) describe tolerances; the two widely referenced classes are A and B, with class A offering tighter accuracy than class B.

Applications span process control, HVAC, laboratory instrumentation, and industrial monitoring, where stable and repeatable temperature readings are required. Variants of Pt100 technology include Pt1000 sensors and different packaging styles, from miniature probes to industrially rated assemblies.

See also: Resistance temperature detector, Pt1000, IEC 60751, RTD calibration.

Notes: If you encounter Pt100lävi in a specific document, its exact meaning should be defined by that source, as terminology can be vendor- or region-specific.