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Mpx5010 Pressure Sensor / Volume Measurement

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andytork

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All,

Has anyone any real world experience with the freescale 5010 sensors. Got one hooked up today to write some software for and what I see is the pressure dropping over time.

This of course would suggest a leak of course. I can confirm I don't have a leak

Hooked it up with / without bubbler / with / without non-return valves. Appears to drop 0.01v every 30 seconds or so until it pretty much hits atmosphere (around 0.08v) . My voltmeter is not the best, but the arduino shows the same so not worried about the exact voltages, more the unexpected change.

I have tried a couple of sensors, different tube.

All the ones I see on the net have a stable reading, why is mine out ?

Any suggestions ?
 

Muscovy_333

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All,

Has anyone any real world experience with the freescale 5010 sensors. Got one hooked up today to write some software for and what I see is the pressure dropping over time.

This of course would suggest a leak of course. I can confirm I don't have a leak

Hooked it up with / without bubbler / with / without non-return valves. Appears to drop 0.01v every 30 seconds or so until it pretty much hits atmosphere (around 0.08v) . My voltmeter is not the best, but the arduino shows the same so not worried about the exact voltages, more the unexpected change.

I have tried a couple of sensors, different tube.

All the ones I see on the net have a stable reading, why is mine out ?

Any suggestions ?

Will confess to knowing absolutely nothing about your query.

Could it by the off chance relate to temp decrease in a sealed unit = reduced pressure??

And i digress!
 

andytork

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No,

the temp is not coming into play, its a constant loss, if it was getting hotter I would expect temp to go up



Will confess to knowing absolutely nothing about your query.

Could it by the off chance relate to temp decrease in a sealed unit = reduced pressure??

And i digress!
 

andytork

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Opened a support query with freescale, basically they said "they do leak a little", seal it
 

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