Freeze dryers

A freeze dryer is a laboratory instrument that removes water from a frozen sample by sublimation under vacuum, leaving the solid structure intact. The process, called lyophilization, is used to preserve biological material, pharmaceuticals and food samples that would degrade under heat. The Questpair catalogue holds 236 freeze dryer listings from 15 verified suppliers and distributors across 7 countries. Of those, 77 percent of the listings are used. New, used and refurbished units all appear, with prices running from EUR 37 to EUR 120.525. Capacity, condenser temperature and shelf area separate a benchtop unit from a pilot-scale system, and those specifications settle most purchases long before brand does.