These perforated cylinder dehumidifiers offer a convenient, safe, and efficient method of maintaining a dry atmosphere. The dehumidifiers expose the desiccant granules to the air to bring about rapid water absorption. The dehumidifiers can be regenerated by placing it in an oven at 425 °F (220 °C) for one to three hours. Two types of dehumidifiers are available.

The mini dehumidifier is ideal for closed containers up to 6 cu ft in volume. It holds 150 g (0.33 lb) of 4 mesh Drierite desiccant and is constructed of 22-gauge metal, perforated with 1/8" holes.

The compartment dehumidifier can maintain extremely dry conditions in airtight enclosures by placing the unit within an enclosure. The unit is capable of drying volumes of up to 200 cu ft. It holds 4.5 kg (10 lbs) of Drierite desiccant and is constructed of perforated aluminum.