Pressure Sensor MPX5700ASX

[ulbin]

Hello! We use the Pressure Sensor MPX5700ASX. Could you explaine: is it normally or defect of sensor when we have a leak of air from a back hole?

[reyes]

Hi Andrey,

No, it is not normal to have a leak of air in the back hole of the device. This can only means that the internal gel/diaphragm is damaged.

This kind of issue is typically caused due to an excessive pressure applied to the sensor, a negative pressure (vacuum) was applied to the sensor, temperatures below/above the specified in the datasheet or because it has being used to measure pressure in a different media than “Dry clean air”. If none of this is true for your case, then it is probable that the pressure sensor is defective.

Have a great day,
Jose

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[ulbin]

Hello! Thanks for your reply. But we have one more question: could it cause damage of sensor when there was a sharp pressure relief of compressed air with the capacity of 60 litres from 500 kPa to zero?

[reyes]

Hi Andrey,

That should not be a problem as long as in the sharp pressure relief, the pressure never goes below to zero (negative pressure/vacuum).