Measuring temperature on pt100

Discussion in 'General Electronics Chat' started by okin, May 10, 2010.

  1. okin

    Thread Starter New Member

    May 9, 2010
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    Hi all,
    I have 2 resistor like on schematic and I want to measure measuring temperature on Pt100. Trough resistors flow constant current of 0.5mA. I want to amplify voltage drop on pt100 and connect that on ADC. What is the best way to amplify a little voltage change on pt100 ?
     
  2. bertus

    Administrator

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  3. someonesdad

    Senior Member

    Jul 7, 2009
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    Also, careful work usually demands a four-wire measurement of the PRT's resistance.
     
  4. retched

    AAC Fanatic!

    Dec 5, 2009
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    An op amp or instrumental amplifier will increase the minute changes to more manageable changes.

    What are you trying to measure? (Object and temperatures) This may not be the best for the job.
     
  5. okin

    Thread Starter New Member

    May 9, 2010
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  6. t06afre

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    May 11, 2009
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    Is this like a school project and you have to use a PT100 element, or can you use other solutions. Do not be afraid to say this is a school project. Everyone is entitled to help in this forum
     
  7. beenthere

    Retired Moderator

    Apr 20, 2004
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  8. t06afre

    AAC Fanatic!

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    I did a search on Google for pt100. Many good hits on that subject
     
  9. sage.radachowsky

    Member

    May 11, 2010
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    If you are using a microcontroller, then also consider digital solutions like the TMP100 or TMP112. Accurate and easy, just need to do SPI communications.
     
  10. okin

    Thread Starter New Member

    May 9, 2010
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    Yes, I must use pt100. But thanks everyone for other advice
     
  11. peranders

    Well-Known Member

    May 21, 2007
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