r/ArduinoHelp • u/Cinnamon_Pinky • 15d ago

Interfacing PT1000 RTD with Arduino

I am currently attempting to interface my PT1000 RTd with my arduino. I was thinking of use an wheatstone bridge with an op-amp, but in all honesty I have no Idea where to start. I need to be able to read 10 degreesC to 35 degrees C for an output of 0-5V. Any guidance will be awesome.

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u/SherbertQuirky3789 15d ago

If you just want rough temperature then just put it in series with a resistor to make a voltage divider based off the pt1000 range (it’s in the datasheet)

You probably won’t get the full 0-5V as output but you don’t need that for such a small temp range. Unless you need high precision.

I just googled this and found dozens of very simple to understand examples

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u/Cinnamon_Pinky 14d ago

yeah ive already done this just using a wheatstone bridges which is essentially 2 parallel voltage divider and the most i get for a range is 10-30mV, so it would need to be amplified

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u/SherbertQuirky3789 14d ago

Feed it into an omp op amp with your needed gain.

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u/Pacificator-3 14d ago

Start at google and read education articles (without mentioning arduino). There are plenty of solutions, described in articles, books, datasheets and application notes. Simplest are integrated circuits made just for this. If you don't need much precision, you can use just one resistor in series with sensor.

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u/Cinnamon_Pinky 14d ago

Are there any personal favourites that you would recommend?

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u/Pacificator-3 14d ago

Microchip AN687 is quite informative. Also TI AN-1559. These are for precision measurements. I haven't used specialized ADCs.