Industrial pressure/vacuum sensors are sturdy and rigid. They have extra protection, for example to use it submersible. The manufacturer often make them for certain voltages (for example 24v) and with different outputs (0..5v output, or 5-20ma output, and so on).
There are cheap versions of those sensors. They are between 5 and 20 dollars on Ebay and Aliexpress.
The manufacturers do not tell which sensor they use inside, and it can be hard to find a sensor that is exactly the one that you need.
The bare sensor is often a piezoresistive sensor in a wheatstone bride configuration. The output voltage span of those sensors is very low and not suitable to connect directly to an arduino board.
The advantage can be that they do not have a operating voltage. Only a maximum voltage.
The ideal pressure/vacuum sensor has a temperature compensation and a gain and a output span that is near 5v. You find most of them at nxp.com.
Luckely they have also a vacuum sensor with a large range, for example the MPXV6115V.
Those sensors are ratiometric. Power them with the arduino 5v and use the arduino 5v as analog reference (that is the Arduino default setting). When the 5v changes, the resulting measured pressure does not change and is still accurate.
Never solder something to the unused pins. Those pins can be connected to something inside.
There are a few ways to calculate the pressure. One way is to use the formula from the datasheet, the other way is to map the output voltage span to the pressure span and correct for the offset of the output voltage.