Differential Pressure Sensor Specifications

[jeffreyswelch]

Using a 0 - 10 kPa differential pressure sensor, can I measure 70 - 80 kPa pressure changes or would that require a 0 - 100 kPa sensor?

I've actually used a MPXV5010DP (0 kPa to 10 kPa) sensor in this environment and it didn't work as well as I had hoped.  Wondering if it is the wrong sensor for the application.  Am I overpressurizing it?  I'm not sure if the differential pressure specification refers to a differential pressure "within" the specified range or if it means that it cancels out the differential pressure and is appropriate for a 10 kPa range. I actually need as much resolution as possible between 70 kPa and 71 kPa.

[lisettelozano]

Hello Jeff,

No, the MPXV5010DP (0 kPa to 10 kPa) will not be able to measure up to >70 kPa as per its maximum pressure range is 40 kPa (P1>P2); this value is specified in table 2 from the datasheet.

The differential pressure specification refers to the measurement between two points where the pressure is applied to both sides (Port P1 and Port P2) of the sensor.

If you want to measure a pressure between 70 kPa and 80 kPa, we can recommend the MPXV5100DP (0 kPa to 100 kPa) differential pressure sensor. It has a maximum error of 2.5% over 0 to 85 °C. You can find more information here https://www.nxp.com/products/sensors/pressure-sensors/differential-gauge-up-to-115-kpa/0-to-100kpa-d...

I hope this information can be helpful.

Have a great day,

Paulina