Forget about renting nitrogen tanks — laboratory applications aren’t on the same level as buying helium for a kid’s birthday balloons. Critical operations can’t wait for resupply. What happens when production stops because the gas supply has depleted, or when valuable experiments or products are ruined because of moisture exposure? As far as the old-fashioned nitrogen delivery via tank and truck, why wait to have crucial laboratory supplies left on the cleanroom stoop like old milk bottles? How much time should personnel have to spend refilling each tank? And where in the space-starved facility should the bulky supplies wait for use?
Proper alignment of doors will prevent excessive gas escape and ensure door sensor alignment. Some leakage, however, is normal. Because cabinets operate under varying degrees of positive pressure, Terra door gaskets are designed to allow controlled gas escape.
All cabinets are checked prior to packaging to ensure proper door alignment. However, they can come out of alignment during shipping due to the inherent flexibility of plastic.
Doors feature sensor magnets that must be aligned with the associated sensor on the desiccator door. If these magnets are misaligned, the Dual Purge™ system may not function properly, and door seals may not seat properly, allowing nitrogen leakage.
Static electricity is an excess or deficiency of electrons on a surface. The total number of deficient or excess electrons determines the charge on that surface. A surface exhibiting an excess of electrons is charged negatively, and an electron-deficient surface is charged positively.
Electrostatic charges are usually generated by friction between and/or separation of two dissimilar materials, at least one of which is a nonconductor or a poor conductor of electricity. The accumulated charge (stat
Nitrogen is the standard medium for contamination-free storage because it is relatively inert—it neither reacts with stored materials nor carries moisture—and because it can be isolated and purified relatively inexpensively.
Desiccator cabinets must be set up so that an appropriate flow of nitrogen forces out all moisture- and contamination-laden air. Because nitrogen has a lower specific gravity than air, it is introduced into the upper section of the desiccator;
As critical components become smaller and more sophisticated, their susceptibility to moisture damage increases.
Once absorbed by sensitive components, water creates a number of potentially disastrous conditions. Even minute traces of oxidation, the most notorious result of moisture exposure, can degrade soldering and other manufacturing processes. Because water dissolves ionic contaminants, it also alters the conductivity of the material, which in turn can degrade electrical function. Water also combines with other materials, causing harmful chemical reactions that degrade pharmaceutical samples and chemical mixtures.
One particularly costly example of moisture-related damage is the "popcorn" effect that occurs during reflow soldering of IC pac
At first glance, most desiccators look pretty similar. It's not until you put them into service—and fill them with delicate, expensive parts—that differences in quality become apparent.
When you invest in a Terra desiccator cabinet, you benefit from 40 years of design innovation and manufacturing experience. Simply put: Terra desiccators function better and function longer.
IsoDry desiccator cabinets are the latest, patent-pending innovation in desiccators from Terra Universal. Desiccators are containers designed to reduce relative humidity (RH) for moisture-sensitive stored items, either by purging the container consistently with nitrogen, using silica gel desiccants or pulling vacuum. The IsoDry desiccators use nitrogen to accomplish this task, both in achieving and maintaining a humidity “set-point.”
How do IsoDry Desiccators Work?
Terra’s desiccator cabinets rely on a basic tenet of natural physics: buoyancy. Buoyancy is a function of density and mass between at least one fluid and another material. In our applications, it relies specifically on the fact that purified nitrogen is less dense than atmospheric air. Pumping nitrogen into an enclosed environment pressurizes both the air and the nitrogen, and the difference in densities causes the nitrogen t
Desiccators are a safe means of storage for highly-sensitive samples or materials. A continuous purge of nitrogen or other process gas creates the positive pressure environment that’s conducive to a contamination- and humidity-free desiccator. But, what if a purging system allowed your desiccator to do more than just store parts? What if it also automatically reduced nitrogen costs and prevented overpressure? Terra’s Dual Purge system does exactly that—and when it’s paired with the NitroWatch humidity control system, the relative humidity percent set-point is automatically monitored and maintained. Keep reading to find out how this dynamic duo has changed the way we use desiccators.
Why might my purging system be out of date?
Many purging systems use a high volume of nitrogen (or other process gases) in order to avoid build-up of moisture inside the desiccator, as well as infiltra
Desiccants, more commonly recognized as those tiny packs of silica gel found in new shoes or luggage, have dozens of useful purposes in our daily lives. Some of the most effective desiccant gels can absorb up to 40% of their weight in moisture, protecting our gym bags from mildew or our silver jewelry from tarnishing. Although quite versatile, this household method of dry storage is usually not enough to preserve highly sensitive materials from moisture or contamination. Here are five critical specimens that you’ll find in a high performance, nitrogen-purged desiccator cabinet.