2 comments on “Altimeter Stick

  1. Hi there

    I just wanna know that for the pressure sensor MPL3115A2, is there a requirement that the environment should have some airflow environment. in my case the environment is closed and almost sealed.What is going to be the effect on the results?

  2. I don’t think you really want airflow on/past the sensor but you do need to have it exposed enough so it can measure the ambient pressure. If it is in a sealed container, it would never detect any pressure changes. I’ve noticed that you must be very careful about how you expose the sensor to the surrounding air – too much and the flow can be seen as pressure fluctuations, too little and it won’t perceive the changes.

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