Digital Vacuum Gauge  1.Unique patented thermal conductivity sensor automatically compensates for temperature 2.Replaceable,cleanable,plug-in sensor handles 450 psi positive pressure. 3.Displays 8 different units of vacuum(microns,Torr,Bar,Psi,kPa,Kg/cm2, mmHg,inHg) 4.12"coiled sensor cord stretches to 24" for easy reach,connectivity,and readability of display 5.Operating Temperature Range:32°F to 122°F(0 °C to 50°C) 6.Low banery indicator. 7.Automatic shut-off after 15 minutes.