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Leak rate of MPXV pressure sensor

Question asked by Thierry Saive on Jun 5, 2020
Latest reply on Jun 8, 2020 by Jose Alberto Reyes Morales

I face the need to evaluating the leak rate of the sensor MPXV5004GC7U.

 

In our application, a given amount of air is trapped at the base of a water tank but connected with a pipe to the sensor.
The air pressure gives an information about the level of water in tank.
In case of leak, the amount of air will reduce, water will finally go up in the pipe, distording the level measurement.

 

I found this similar question: https://community.nxp.com/message/1299877?commentID=1299877#comment-1299877 

In your answer above, you stated: "the maximum allowable leakage rate (for these devices) at our test gate is 0.182kPa/sec (with 50kPa absolute applied)."
It would definitely help to know which amount (volume or mass) of air is trapped in between the pressure test équipement and the sensor.

Could you give some values or at least rough estimation ?

 

Many thanks

 

Thierry

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