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.”
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.
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.
When storing sensitive materials in a desiccator cabinet, unnecessarily high gas flow into the chamber or misalignment of the cabinet can lead to costly nitrogen waste. Positive pressure within a desiccator is meant to push unwanted moisture-dense air through the cabinet’s release valves and prevent the ingress of moisture-laden air. This continuous process leaks a small portion of gas, since desiccators are not 100% air-tight systems. Let’s consider three of the top reasons why your desiccator may be leaking:
Nitrogen is the most common element in the Earth’s atmosphere; its inert nature makes it extremely valuable for a wide range of industrial and commercial applications. Unfortunately, most of the world’s nitrogen is mixed with highly reactive oxygen in the form of air, which is completely unsuitable for applications requiring pure nitrogen.
Terra Universal Nitrogen Generators rely on membrane separation to produce up to 99.9% pure nitrogen on an as-needed basis for a variety of applications. While membrane separation does not produce the ultra-high purity, 99.99% and above, nitrogen required for some applications, its convenience and flexibility makes it the obvious choice in the majority of cases. Membrane-based Nitrogen Generators also boost the reliability of the gas supply by eliminating reliance on nitrogen storage tanks, which require regular refilling and, when they run low, can disrupt critical nitrogen processes.
Terra Universal offers three models of Nitrogen Generators, the 2700-09A, 2700-11A, and 2700-12A. Each is a standalone cabinet design that requires only a source of compressed air to provide a steady stream of purified nitrogen. One of the biggest benefits of membrane separation is the cost of operation, which is that of running the air compressor to feed the generator. Membrane separators have no moving parts, making them extremely long lasting, and because they rely on the physical properties of the membrane, they do not require a power source to operate. This keeps operating costs down, by providing a steady stream of nitrogen whenever necessary.