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HDC3120: Tested for use in synthetic and mineral oil?

Jack MacNeill
Prodigy 10 points
Part Number: HDC3120
Other Parts Discussed in Thread: HDC3020,

Tool/software:

I am looking for an analogue sensor that can accurately measure the % RH of H20 in oil for a custom application. The rated accuracy and spec is obviously only advertised for applications in air but I was wondering if there had been any testing for reliability in oil.

  • 0
    TI__Genius 13045 points

    Jack,

    We have not tested any of our humidity sensors for humidity accuracy in any medium other than air. What kind of oil are you considering? 

    We have tested our humidity sensors for temperature accuracy in oil baths, and the devices will report humidity values. So I know at least the humidity sensor is functioning in oil, I just cant speak to how accurate it is in oil.

    Regards

    -Alex Thompson

  • 0 in reply to Alex Thompson
    Prodigy 10 points

    Hi Alex,

    We use IEC and ASTM mineral oil and both synthetic and natural ester oil.

    As long as the sensor will not react/corrode in these oils I can do testing on the sensors to determine if it's fit for purpose.

    Thanks.

  • 0 in reply to Jack MacNeill
    TI__Genius 13045 points

    Jack,

    Thanks for the information. You are welcome to try the part in those oils, I don't think the package would corrode. Some of these oils can have acidic pH, which can affect the sensing element over time. So when doing the test, I would recommend doing a few read points over long submersion periods to see how the RH performance changes over time.

    Regards

    -Alex Thompson

  • 0 in reply to Alex Thompson
    Prodigy 10 points

    Hi Alex,

    Yeah we will need to run some tests to see how it performs.
    Do you know when the chip and the 3D model will be available?

  • 0 in reply to Jack MacNeill
    TI__Genius 13045 points

    Jack,

    For the 3D model, I would use the models for the HDC3020 since they are the same package and physical construction. 

    The HDC3120 should be publicly released this month, so be on the lookout on TI.com for it.

    Thanks

    -Alex Thompson