Liquid Nitrogen Secondary Trap

For processing samples with ultra low eutectic points.Secondary Trap connects in series with a freeze dry system and vacuum pump to prevent contaminants from migrating into the vacuum pump.After pulling a vacuum, liquid nitrogen may be introduced via the liquid nitrogen port.Liquid nitrogen cools to -196° C (-321° F) to trap contaminants with low eutectic points.The well may be defrosted and the liquid drained from the drain hose.Glacier white epoxy-coated steel construction.Two valves may be opened (trap) or closed (by-pass).Opened valves allow gaseous contaminants to be trapped in the liquid nitrogen well.Closed valves allow gaseous contaminants to by-pass the well during defrosting and draining.3/4" OD inlet and outlet connections.Includes an insulated filler tube for connection to a user-supplied liquid nitrogen tank!20" rubber tubing!3/4" ID x 3/8" wall!and two clamps.Liquid nitrogen is required (not included).