ACE Instruments offers Direct Mounting Digital Gauges. ACE Instruments offers products for various industrial process control instrumentation like pressure, temperature, relative humidity, etc. The Direct Mounting Digital Gauges come under section of Digital Vacuum Indicators. These are provided with 4 1/2 Digit Dot Matrix Green Backlit L.C.D. Display with On or Off Selection front keys. These gauges offer Resolution: 0.1 Torr /0.1 mm Hg./0.1 mBar and Accuracy: Better than +/- 1 mm Hg. Or +/- 1 mBar.