TPI 635 Manometer Pressure features
Differential input with +/- 5 PSI range.
Seven units of measure (mbar, kPa, PSI, mmHg, inHg, mH2O, inH2O). Display - 4 digit dual line with backlight Smooth - Stabilizes display when measuring fluctuating pressures Data Hold - Freezes reading on display. Min / Max - Records Min/Max readings Auto Off - Conserve battery power.