The VIVOHOME 2-Stage Vacuum Pump is engineered for technicians, installers, and serious DIYers who demand reliability and performance. Whether you're evacuating a home HVAC system, installing a mini-split, or servicing an automotive air conditioner, this powerful 5 CFM pump delivers the fast pull-down and ultimate vacuum depth required for a clean, moisture-free system. This leak detector uses the heated diode detection principle, having higher detection accuracy. The detector has a maximum sensitivity of 0.035oz/yr and can detect a wide range of refrigerants. This detector can be widely used in the repairing of refrigerators, air conditioners, automobiles, etc.