The sensor will only be used to sense pressure, but will occasionally be exposed to small vacuum pressures. Will this affect the accuracy of the pressure readings? How much vacuum can the sensor be exposed before it is damaged or out of spec?
The MEMS inside the part are not designed to handle vacuum. Even though the negative pressure is tiny or is present for a very short periods of time, the part will be damaged, maybe not to the point of being useless, but it will gradually stop working properly.
Since this is a disposable device it might be an option to expose it to vacuum, unfortunately we haven't characterized how much time will it resist the negative pressure before breaking.
The MPX2300DT1 will not be damaged as long as the pressure in port one is greater than pressure in port two (P1>P2).
The backside of the device is referred to as P2 (where the die is exposed). This is the side of the device is usually exposed to the ambient. P1 is referred to as the Front side of the devices. P1 is where a positive pressure is applied. P1 is to remain greater than or equal to P2. If this condition is broken then integrity of the sensor is compromised, so it's not really recommended to apply vacuum to the main port. If you want to measure negative pressure, we do have some other sensors that can handle negative pressure, for example: MPXx5004, MPXx5050, MPXV7002 or MPXV7007DP.
The customer does not want to measure vacuum, just that they want to know they will not damage the part if P1 is exposed to vacuums for short periods.
Are you saying the device can be compromised any time and for any duration should P1 < P2?
Retrieving data ...