How do RTD's work

This topic contains 1 reply, has 2 voices, and was last updated by John C John C 5 months, 2 weeks ago.

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  • #9936

    Edgar Mcdaniel
    Participant

    Hi want to know how an RTD works?


  • #9937
    John C
    John C
    Galco Representative

    Hello Edgar, sure thing, good question.

    RTD’s are made with metal filaments of 1 of 3 different materials. Platinum, Nickel or copper are the 3 main materials they are made with. However platinum apparently has the best temprature to resistance range of these 3 materials. Pure platinum has a resistance change of 0.003925 ohms per degree C. It is the most stable and the widest temp range -272.5 C to +961.8 C. Platinum is also the material of choice for its chemical inertness. So when metal heats up resistance goes up and temp down and resistance down too.


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