Hi, only overpressure is specified in the maximum ratings in all the datasheets I've seen for pressure sensors. I'm using the MPL115A sensor, and there it's specified 1000kPa overpressure as a maximum. What is the maximum underpressure for this component? Will it handle -0.5 Bar?
Hello Roger,
Absolute Pressure Sensors like the MPL3115A are designed to measure an external pressure relative to a zero–pressure reference (vacuum) sealed inside the reference chamber of the die during manufacture. You mentioned that you would expose the sensor to -50kPa (-0.5Bar), how did you measure that level? Did u use a gauge manometer?
If that’s the gauge pressure level inside a chamber (tank or something similar), then you would be exposing the MPL115A to the atmospheric level minus 50kPa, which is around positive 50kPa (absolute pressure).
Please let me know if I misunderstood your question.
Hope it helps!
Josh
Thanks for your reply Joshvelle! I got the info I needed.
I was unsure how you made these sensors. The reason why I asked the question was because I'm following a procedure to fill a tank with a specific gas (first to make vacuum, when filling it with gas). In the procedure it is said that the electronics inside could be exposed to pressure of -0,5Bar. I would assume they have used a gauge manometer when they made the procedure, to be able to determine the pressure value.
- Roger
Roger,
you're welcome, please contact us back if you need further support.
Have fun!
Josh
Hello Roger,
Absolute Pressure Sensors like the MPL3115A are designed to measure an external pressure relative to a zero–pressure reference (vacuum) sealed inside the reference chamber of the die during manufacture. You mentioned that you would expose the sensor to -50kPa (-0.5Bar), how did you measure that level? Did u use a gauge manometer?
If that’s the gauge pressure level inside a chamber (tank or something similar), then you would be exposing the MPL115A to the atmospheric level minus 50kPa, which is around positive 50kPa (absolute pressure).
Please let me know if I misunderstood your question.
Hope it helps!
Josh