SLP33A-LP sensors come with a calibrated voltage output for pressure measurement of .3 to 3 psi. Input of 2.7 to 5.5V. See model SLP33A-STD for higher calibration ranges.
SM5420 absolute pressure sensor has a millivolt output and various pressure ranges from 0-15 psi up to 0-100 psi. Ultra small SO-8 package. Low cost - approximately $1 in quantities of 25,000!