Features and Benefits: * Large LCD displays readings in microns, Pascal or millibars * Wide display range from atmosphere (760,000 microns) down to 1 micron * Industry-first inline filter protects sensor * Low-battery warning indicator * Auto shut-off conserves battery life Features technologically advanced Pirani sensor. Accurately displays vacuum level at every stage in the evacuation cycle, from atmosphere down to one micron! User knows instantly if connections are tight! Works with any vacuum pump. Includes 9V battery, spare filter and compact storage case.