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A platinum resistance thermometer (PRT) is a thermometer constructed from a high purity platinum element (wire-wound coil or thin film) placed in a tube of metal or glass and sealed with an inert atmosphere and/or mineral insulator. Two, three, or four leads are connected to the element and are used to provide for the measurement of the electrical resistance of the element
Wide temperature Range (–260°C to 1000°C)
Electrical resistance is typically between 0Ω and 400Ω and depends on temperature
Excitation current is typically 1mA
Stable over time
Stable over temperature
Shallow slope (i.e. 0.4Ω/°C for a 100Ω PRT)
Relatively easy to measure
Relatively easy to calibrate
Commercially available in many configurations
A platinum resistance thermometer (PRT) is a thermometer constructed from a high purity platinum element (wire-wound coil or thin film) placed in a tube of metal or glass and sealed with an inert atmosphere and/or mineral insulator. Two, three, or four leads are connected to the element and are used to provide for the measurement of the electrical resistance of the element
Wide temperature Range (–260°C to 1000°C)
Electrical resistance is typically between 0Ω and 400Ω and depends on temperature
Excitation current is typically 1mA
Stable over time
Stable over temperature
Shallow slope (i.e. 0.4Ω/°C for a 100Ω PRT)
Relatively easy to measure
Relatively easy to calibrate
Commercially available in many configurations
