MP3H6115A

[nj_caramelli]

Hi,

About the MP3H6115A absolute pressure sensor, the datasheet states Weather station as a typical application for this sensor.

My questions:

1] What is the lifespan/MTBF when the sensor is used in outdoors applications as a Weather station ? We aim to reach AT LEAST a 5-years lifespan in our product, is that OK?

2] Is this sensor subject to dampness/corrosion/oxidization? In particular:

   a] Does this sensor should be protected against such damages?

   b] If yes, that are your recommendations to do that?

   c] Is a filter cap (PTFE) exist to protect this sensor of damp?

   d] Or is there a reference of this sensor with an integrated filter cap on the hole of the sensitive part of the sensor?

3] Do you have any expertise/experience about long term effects of outdoors environments on our sensor?

FYI the sensor we're implementing on our products is the one shown on the picture and we worry about using it in some of our outdoor sensors without protection against damp.

Thanks in advance for your answers!

Regards.

[lisettelozano]

Hello Noe-Jean,

   1] What is the lifespan/MTBF when the sensor is used in outdoors applications as a Weather station ? We aim to reach AT LEAST a 5-years lifespan in our product, is that OK?

For the MTBF/FIT values, please go here and submit a Support Request (click on Go to tickets); in this way, the team in charge will be able to provide the information.

Please note that these-type predictions are based on results from testing/calculations at very specific conditions, so if the customer's application conditions are any different (which of course is almost always the case), then the MTBF calculation is provided FOR REFERENCE ONLY with the expressed disclaimer that we cannot take responsibility for predicting sensor life in the customer's application (especially since we rarely have any critical application details) - that is the customer's responsibility.  And, as always, the customer ultimately retains the final decision relative to the total design and functionality of the end product. NXP neither guarantees nor will be held liable by the CUSTOMER for the success of a project based on information provided for reference only.

   2] Is this sensor subject to dampness/corrosion/oxidization?

For all NXP standard pressure sensor products, any environment other than dry air will have some impact on the reliability and lifetime of the product. NXP’s silicon pressure sensors are NOT compatible with oil, gas, petrol, and water or water vapors, or chemicals. 

 Therefore, the sensor should be protected against dampness/corrosion/oxidation with a housing protection. We do not have any reference for such protection as per it depends on each customer application. We do have these application notes that can be helpful:

AN3728: Media Compatibility for IPS PRT Pressure Sensors

https://www.nxp.com/docs/en/application-note/AN3728.pdf

AN936: Mounting Techniques, Lead Forming, and Testing of the MPX Series Pressure Sensors

https://www.nxp.com/docs/en/application-note/AN936.pdf

I hope this information can be helpful.

Best Regards,

Paulina