End-Zone provides an alternative to visual inspection making it easy to determine when freeze drying is complete. It eliminates guesswork and ensures sample dryness. End-Zone will alert when sample moisture levels have reached the user-selected level. End-Zone compares the vacuum level of an empty valve to the vacuum level inside a Fast-Freeze Flask containing the sample. Operating with FreeZone's Lyo-Works OS, End-Zone provides an alert on the display screen and, if programmed, sends an email to the user when end point is detected.. For FreeZone Freeze Dryer. Sold in each. Country of Origin : United States. . . Labconco 780902000 End-Zone Add-On Kit for FreeZone Freeze Dryer. Country of Origin : United States. Part Number : 1169H01EA. Pack of : 1.