Pressure sensor compensation

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Pressure sensor compensation

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Beta
Contributor I

Hi

i have to use the mpxm2010 sensor in a -40 to +40 tem range. This sensor is compensated in the 0 to +85 range. With a temperature sensor, how can i do to correct the drift in negative temperature range? What is the formula to correct the pressure value ?

thanks

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Joshevelle
Senior Contributor I

All the information we provide is only guaranteed under the specified conditions (0 to 85°C). Unfortunately we have no documentation regarding the MPX2010 response in the range you need.

This device has a differential output; therefore you’d need an instrumental amplifier. What I can suggest you is to test both, the sensor and your amplifier in the -40° to 40°C, so you can characterize the full system response. Your amplifiers gain factor would change as well as the sensors behavior.

The MPX2010 is a linear device but the temperature factor would change from one range to another, i.e. the transfer function would not be the same at -40°C than at -10°C.

Once you have the system response in the full range (you already have from 0 to 40°C) you can generate a transfer function to obtain the pressure value. I’d also recommend you to use a microcontroller with an integrated temperature sensor, so you can change your temperature factor as needed.

Hope it helps. =)

Regards,

Josh


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