Hi,
The pin assignment is as follows:
1 – N/C
2 – Vs (Supply Voltage)
3 – GND (Ground)
4 – Vout (Output Voltage)
5 – N/C
6 – N/C
7 – N/C
8 – N/C
Pin 1 can be identified by a small notch in the lead.
Please note that the MPXV5010G is a gauge pressure sensor measuring the pressure difference between the P1 port (input pressure) and an ambient pressure.
If you are looking for a vacuum pressure sensor, I would recommend you the MPXV5050V.
BR, Tomas