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! Large LCD provides readings in microns, Pascal or millibarsWide display range from atmosphere (760, 000 microns) down to 1 micronIndustry-first inline filter protects sensor from contaminants, eliminating need for cleaningLow-battery warning indicatorAuto shut-off conserves battery lifeWorks with any vacuum pumpIncludes 9V battery, spare filter and compact storage case