RTD and PRT

RTDs (resistance temperature detectors) are resistive devices made of platinum, nickel, copper, or other material. Platinum RTDs, known as PRTs (platinum resistance thermometers) are very accurate temperature measurement sensors.

A PRT element is a specialized resistor with two connection points. Most PRTs are either 100 Ω or 1000 Ω. This number is the resistance the PRT has at 0 °C. The resistance of a PRT increases as it is warmed. Industry standards define how PRTs respond to temperature.

BrHalf4W() in combination with PRTCalc() are the recommended CRBasic instructions for measuring RTDs.

See the CRBasic Editor help for detailed instruction information and program examples: https://help.campbellsci.com/crbasic/cr300/ .