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HDC2010: Under the gas environment.

Kengo.Y
Guru 11165 points
Part Number: HDC2010

Hi team.

Thank you for your usual support.

I'd like to ask you about inconvenience under the gas(Almost a Methan / CH4)) environment.

Can we measure accurately?(We need to measure accurately.)

If it is No, let me introduce a different device or other solution.

sincerely.

Kengo.

  • 0
    TI__Guru**** 244400 points
    Hello Kengo

    Let me check with the concerned engineer on the same.
  • 0 in reply to Amit Ashara
    TI__Expert 5695 points

    Hi Kengo,
    The sensor element used to measure humidity, which is exposed by the opening on the bottom of the IC, could be negatively impacted by certain type of gases and chemicals. The key impact is on RH (relative humidity) accuracy degradation. There are some of these chemicals and gases listed in the application note with link below, We highly recommend to review it in detail to any humidity sensor user.

    Humidity Sensor: Storage and Handling Guidelines: www.ti.com/.../snia025.pdf

    With respect to specifically Methane TI didn't do any test on it, since as you can imagine we cant not verify all possible gases or chemicals.

    What we recommend to for you or any other user with similar concerns is to test the devices under controlled and predictable humidity conditions before and after exposure to the gas or chemical under consideration. If there is a shift on the RH value you can conclude that this gas affects the sensor accuracy and you need to plan to protect it for your applications. Any filter that allows the water vapor molecules to pass and filter the gas should work.
    We don't have any specific recommendation on filters at this point.

    Regards,
    Jose