69020 OMNI Digital Vacuum Gauge 1/4" Coupler Compact, easy-to-use, and more unique features than any other unit on the market. The MNI Digital Vacuum Gauge is an easy-to-use, compact vacuum gauge that is loaded with features for the price. And it's rugged, too. With a high impact, glass reinforced housing, it survives moisture and accidental drops or attachment to a high pressure line. The easy-to-clean vacuum sensor handles 450 psi positive pressure and reads several units of vacuum (microns, millibar, Torr, and Pascal). Digital vacuum gauges measure the negative pressure level in HVAC systems and display their readings on digital displays. Features: Broad sensor range Visual signal when target vacuum level is reached Electronic paper display for clear visibility - even in direct sunlight Rich and intuitive user interface - turn it on and its ready to use with default settings 45° degree bend for fitting 1/4" Automatic power down and time out Power savings - multiple time-out selections Low battery indicator and automatic power-down when inactive Adapter fittings available Vacuum Reading Resolution: 1 micron (from 1,000 to 5 microns) 10 microns (from 10,000 to 1,000 microns) 100 microns (from 25,000 to 10,000 microns) Display Vacuum Measurement Accuracy: +/- 20% of reading (from 10,000 to 25 microns) Vacuum Reading Range: 5 to 25,000 Microns 33.3 mBar, 25 Torr, 3330 Pa Progress bar-graph from Atmosphere (ATM) To 25,000 Microns Proof Pressure: 450 psi Working Temperature: 32°F to 104°F (0°C to 40°C) Storage Temperature: -4°F to 140°F (-20°C to 60°C) Working Humidity: 0-95% RH (non-condensing) IP Class: IP-50 Battery Life: 100+ hours continuous Battery: (2) AAA batteries (included) Size: 6” long x 1.6” wide x 1.6” thick including fitting (15.3 x 4 x 4 cm) Weight: 0.39 lb (175 grams)