Desiccators & Accessories
A desiccator is a sealed chamber that provides a controlled environment to protect objects from dust and moisture. Some desiccators are also used to remove moisture from the objects themselves. Desiccators are used in laboratory, cleanroom, and research applications to protect a variety of dust- and moisture-sensitive materials including film, pharmaceuticals, chemicals, and electronics. A non-vacuum desiccator, sometimes called a desiccator box, is the most basic type and is simply an airtight chamber containing material called a desiccant that absorbs excess moisture from the air. Some models are designed to be used in refrigerators or other cold storage. Other types include vacuum, gas-purge, and automatic.
A vacuum desiccator uses a vacuum pump to pull air from the chamber, and is most often used to dry objects and for materials that require extremely low humidity or are sensitive to air. It differs from a gas-purge desiccator, which introduces dry gasses such as nitrogen to expel air from the chamber. An automatic desiccator is often used for storage that must be frequently accessed. It has electrical heaters and fans that continually regenerate the desiccant that is used to provide a constant humidity over long periods with very little monitoring and maintenance. Some desiccators have integrated temperature and humidity gauges that enable users to monitor and record the internal environment. A desiccator cabinet is any desiccator that opens from the front. They range in size from tabletop to floor standing and can be non-vacuum, vacuum, or gas-purge types. Some desiccator cabinets are stackable, allowing users to expand capacity as needed.
Features to consider when selecting a desiccator include the space available to store the desiccator, external dimensions and capacity, the possible need to expand capacity over time, ambient temperature and humidity of the surrounding environment, how often the desiccator is accessed, monitoring requirements, and chamber humidity and temperature requirements.