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The SVG3 Digital Micron Vacuum Gauge includes a large dual display with rate indicator, alarms, timers, a rubberized case, and rugged strap and hook that hangs at an angle to make reading the display easy. The dual display indicates live vacuum measurement in microns of mercury on the top line, and the rate of micron change, or the alarm stopwatch on the bottom line. When the vacuum reaches the alarm set points, an audible alarm triggers, the backlight flashes and the integrated stopwatch re-starts to show technicians how long the system has maintained a deep vacuum. The technician can set both high and low alarms. The timer can display how long it took to get to the alarm and how long the vacuum has been maintained since the alarm went off. The SVG3 also includes a Schrader depressor so the HVACR technician can connect it directly to a valve core removal tool or a service port, thereby reducing the number of potentially leaky connections. Attaching the vacuum gauge directly to the service port or a core removal tool also allows techs to get a vacuum measurement as close to the system as possible, giving a truer measurement of the vacuum level in the system. The SVG3 measures from 9,999 down to 0 microns. The resolution is 1 micron of mercury. The case is rubberized to take the use and abuse seen in the field.