ANANIAS Empowering you to work smarter HE Micron Vacuum Gauge t uses the Plenary high precision vacuum sensor to precisely messieurs vacuum levels. Digital display tors a comprehensive view of vacuum conditions. When reaching the preset vacuum revel, It wil buzz Py ry the prose vacuum level, It wil Buzz rapidly and fish the back light to warn of leaks. Leading Technology, Superior Curt, Best Experience.