Oil Pressure sensor is ABS??

Or does it not make a big difference if I'm only putting around at 2000' typically? Even with small changes in barometric pressure, I guess it's only a couple of psi difference??

OK I now realize this is the 4th gen sensor part no. 456180. I've read a few threads here discussing it's range of 0.75 to 10.75 bar but no one seems to discuss that it's measuring absolute pressure meaning it's referenced to 0 bar absolute (vacuum). So with engine off and atmospheric conditions of 1 bar, the sensor will indicate an oil pressure of 1 bar (14.7psia). On the ground engine running, the indicated pressure will be 1 bar (14.7 psia) higher than actual. I just don't get using an absolute pressure sensor for indication of oil pressure.