A PT1000 element consists of a coil of wire or a deposited film of pure metal. The resistance of the element increases with temperature in a known and repeatable way. Pt1000 temperature probes have excellent accuracy over a wide temperature range.
Temperature range: -200 to 700 degrees celsius
Sensitivity: The voltage drop across a resistance temperature detector (RTD) provides a much greater output than a thermocouple.
Linearity: Platinum and copper resistance thermometers produce a more linear response than thermocouples or thermistors. RTD nonlinearities can be corrected with the proper design of resistive bridge networks.
The most commonly used material is platinum with a resistance of 1000 ohms at 0ºC and a temperature coefficient (Alpha) of 0,0385 ohms / ºC.
Other elemental materials also used are copper, nickel and nickel-iron are also used for the design of PT1000 measuring devices. However, platinum elements predominate because of their wider range, and because platinum is the most repeatable and stable of all metals.