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Terra Part #PriceShips in
Powder Coated Steel 2 55 gallons 52" 26" 45" 1989-20$3,1261-3 Days
Powder Coated Steel 2 30 gallons 46" 24" 37" 1989-21$2,5411-3 Days
Powder Coated Steel 2 16 gallons 34" 17" 33" 1989-22$1,7701-3 Days
Powder Coated Steel 4 16 gallons 64" 17" 33" 1989-23$2,1374-6 Days
304 Stainless Steel 2 55 gallons 52" 26" 45" 1989-00$3,1761-3 Days
304 Stainless Steel 2 30 gallons 46" 24" 37" 1989-02$2,6711-3 Days
304 Stainless Steel 2 16 gallons 34" 17" 33" 1989-04$2,2134-6 Days
304 Stainless Steel 4 16 gallons 64" 17" 33" 1989-06$3,9074-6 Days
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Product Details

• Ideal for bulk pharmaceutical powders, chemicals and agricultural supplies

• Helps prevent moisture-related degradation

• Fittings included for nitrogen gas purging

• Reinforced 304 stainless steel storage

• Models available for 16-, 30- and 55-gallon bulk drum canisters

• Durable construction, easy-clean to clean and disinfect

• Digital hygrometer displays relative humidity inside cabinet

• Heavy-duty LiftLatches™ and hinges

• Optional Flowmeter available

• Cabinet may be vented to exhaust harmful particles

• 3” legs allow cleaning underneath the cabinet

Desiccator Storage Cabinets for Bulk Pharmaceutical Powders

Standard Features

  • A Reinforced Stainless Steel Construction
    Four space-efficient sizes support two or four standard 16-, 30- or 55-gallon bulk storage drums; low-profile loading pallets available
  • B Grounding terminals
    Safely removal of static charges to prevent electro-static discharge (ESD)
  • C Stainless Steel LiftLatches
    Ergonomic stainless steel lifting latches ensure tight seal. External operation prevents internal contamination, and multiple pressure-points enhances seal; non-outgassing elastomer gasket included
  • D Mini-Hygrothermometer
    Convenient display of internal relative humidity and temperature
  • E Stainless Steel Hinges
    Heavy-duty, non-contaminating hinges contribute to long service life
  • F Stand with Nylon Leveling Feet
    3"H built-in stainless steel stand includes non-contaminating nylon leveling feet

Optional Features

  • 1 Flowmeter
    Capped port allows addition of optional flowmeter to allow purge of clean, dry nitrogen
  • 2 Automated Nitrogen Controls: Dual Purge and NitroWatch Systems
    Removable blanking plate simplies addition of Dual Purge and NitroWatch control systems, which automatically regulate nitrogen purge to maintain low-humidity set point
  • 3 Relief/Bleed Valve
    Protects against overpressures when the cart is connected to nitrogen (closes to prevent air influx when disconnected from gas source)

Reinforced construction supports heavy bulk material drums.

Drum Storage Desiccators

  • Nitrogen Generator Group Nitrogen Generators
  • Bulk Dry Material Storage Desiccator Cabinet Cabinet; Dry Bulk Storage, RH-Controlled, 64W x 17D x 33H, 304 Stainless Steel
  • Bulk Dry Material Desiccaor Cabinet, For 30-gallon Drums Cabinet; Dry Bulk Storage, RH-Controlled, 52"W x 26"D x 45"H, 304 Stainless Steel
Nitrogen Generator Group
Bulk Dry Material Storage Desiccator Cabinet
Bulk Dry Material Desiccaor Cabinet, For 30-gallon Drums

Features & Benefits

Features and Benefits

Desiccator Essentials


Desiccator Cabinets: Frequently Asked Questions

What are desiccators and why are they used?

The term “desiccator” commonly refers to two types of equipment and ranges of applications.

Desiccator drying enclosures use vacuum or desiccant, sometimes in conjunction with a fan, to remove moisture adsorbed into the surface layer of a sensitive sample. These enclosures are typically fairly small cylindrical or round glass vessels and are commonly used in life science laboratories to dry biological or pharmaceutical samples.

Desiccator cabinets are typically larger units, often with multiple chambers, used to prevent moisture exposure during storage of sensitive parts. Because storage applications must allow periodic parts access, desiccator cabinets typically include one of more doors and rely either on a desiccant material (regenerating silica gel or molecular sieve) or nitrogen purging to maintain dry conditions.

What are the advantages of nitrogen-purged storage desiccators?

A purge of purified nitrogen is generally preferred in a large desiccator cabinet because such systems achieve a uniformly low-humidity storage environment more quickly than desiccant-based systems, particularly where ultra-low RH levels are required. Nitrogen can be fed into multiple locations in a large cabinet, often using a rear plenum as a distribution chamber. A mixing fan increases humidity uniformity inside the cabinet and promotes moisture dilution. Nitrogen-purged desiccators also prevent contact with oxygen, making them ideal for anaerobic applications.

Desiccant-based systems are preferable in facilities that lack a nitrogen source. However, because desiccant requires a periodic regeneration (heating) cycle, these desiccators cannot provide continuous moisture protection unless equipped with a redundant desiccant module. They are also typically unable to provide ultra-low humidity levels and require a longer RH recovery time when the cabinet is exposed to moisture.

What is RH recovery time?

RH recovery time is the time required to recover a low relative humidity set point when an access door is opened to part retrieval.

The acceptable RH set point depends on industry and application. Many semiconductor and optical sensing devices feature electronics that require a storage environment of less than 10%RH and are degraded by exposure of just a few minutes to moisture substantially above this level. Unfortunately, desiccators can require up to an hour to retain a 10%RH set point, particularly if ambient humidity is very high. If a door is opened again before set point is attained, parts may be exposed to unacceptable moisture levels for hours!

For such critical applications, Terra provides a number of high-efficiency nitrogen-purged desiccators, including the IsoDry line, which ensures RH uniformity and fast recovery time. In large, multi-chamber desiccators, Terra’s NitroPlex system even performs humidity monitoring and control in each chamber independently.

Improved low-RH recovery also reduces nitrogen costs.

How much nitrogen does a desiccator typically consume?

Equipped with an automated gas control system, such as Terra’s Dual Purge and NitroWatch controllers, desiccators consume on average less than five cubic feet of nitrogen per hour, allowing a single 5’ pressurized liquid nitrogen tank to operate a large cabinet continuously for 2-3 days, depending on frequency of access and recovery time.

To eliminate dependence of nitrogen tanks, Terra offers Nitrogen Generators that produce up to 99% pure nitrogen from compressed air.

How can desiccators prevent static-related problems like electro-static discharge?
Even the slightest static discharge can spell disaster for delicate electronic or semiconductor components. Because the dangers of ESD (electrostatic discharge) are amplified in a low humidity environment, Terra strongly urges that you consider these measures as part of your static control program:

  1. Static-Dissipative PVC or Acrylic, commonly used in storage enclosures, is a prolific static generator. Wiping an acrylic desiccator generates surface charges that can discharge onto ESD-sensitive components. Static-dissipative PVC prevents this danger. This material not only dissipates static charges safely but also eliminates the particle attraction that static charges create. Surfaces stay clean, inside and out, making this material perfect for use in cleanrooms. Because static-dissipative PVC is transparent and highly durable, it can be used in place of acrylic in nearly any application, desiccators included. It features a surface resistivity of approximately 10^7 ohms per square and is completely noncontaminating—with no measurable outgassing—and it resists a wide range of chemicals. Note: To protect Static-Dissipative PVC surfaces, desiccators made of this material must include stainless steel shields installed at the bottom of each chamber.
  2. Static-Neutralizing Ionizing Nozzles By ionizing nitrogen molecules as they pass through the desiccator plenum wall, ionizing nozzles neutralize electrostatic charges on all interior surfaces. They provide practical ESD control for charged nonconductive materials, which cannot dissipate charges to ground. And because they eliminate static attractive forces, they help control contamination: in a statically neutral environment, any airborne particles that enter a desiccator are more likely to remain airborne and to be purged out of the cabinet.
  3. Conductive Shelves, Shields and Trays For smaller components that can be stored on shelves, Terra's grounded stainless steel shelving provide a 100% ESD-safe enclosure. Grounded conductive plates (such as shelves) create a Faraday cage that prevents penetration of static charges. Because these conductive units are removable, they also protect your sensitive components from ESD as you transport them from one location to another.

Creating a low-humidity environment requires careful material choice.

Acrylic and other plastics bear a weakness known as hygroscopy. Plastic surfaces naturally accumulate liquid molecules through adsorption, collecting moisture from the atmosphere that clings to its surface in a thin coat. While this might not present an issue for simple operations, it can be a challenge in moisture-sensitive applications.

A potential solution to the issue of humidity in small acrylic enclosures, such as glove boxes and desiccators, is the use of N2. Nitrogen is a dry gas commonly pumped into a chamber to lower the relative humidity and purge moisture to protect the materials inside. But constantly using a high flow of nitrogen gas can be expensive, and for critical applications requiring minimal humidity, compensating for an inherently moisture-attractive material can expend a ghastly amount of N2.

Stainless Steel Advantages for Critical Humidity Applications

Regardless of the type of gas blowing across acrylic, air cannot dislodge moisture particles from its surface or prevent air and liquid molecules from permeating the glued edges of an acrylic chamber. For applications requiring the strictest low-humidity environments, stainless steel provides moisture-impermeable protection as well as corrosion and chemical resistance. And while stainless steel will protect the atmospheric conditions of the environment within the chamber, optional properties for steel types can provide further benefit.

The best resistance to humidity comes from electropolishing, a procedure that removes the top layer of the stainless steel surface. The process entails an electrochemical removal of metal impurities, including carbon, silica and free iron, and it leaves a highly reflective nickel and chromium surface. Electropolishing eliminates the grainy texture of standard stainless steel, which can retain trace amounts of moisture or pathogens that escape cleaning. As a result, the surface has a smooth texture at a microscopic level, and liquid molecules have nowhere to hide.

Moisture Protection in Every Industry
Semiconductors

Terra manufactures desiccators specially configured for ICs, tote boxes, IC carrier reels, and other common microelectronics and electronics parts. Not only does desiccator storage eliminate damage that can be immediately detected, but it also prevents “dwell effect” – the more costly damage that doesn’t emerge until ICs or other components are installed in more complex assemblies, such as medical devices, that are more difficult to repair or replace.

Chemical Samples

Desiccators provide an inert gas environment for storing volatile chemicals. They can also be used for slow, controlled drying, and are available with customized heating capabilities. Use of a nitrogen or other inert process gas eliminates reactions caused by oxygen exposure.

Biological Samples

The dry, inert environment inside a desiccator is ideal for storage of forensic materials, DNA samples, and biological cultures. Easy-clean BioSafe® stainless steel desiccator cabinets are ideal for use with materials that require a sterile environment.

Pharmaceuticals

Dry storage inhibits growth of organic contaminants and retards other chemical reactions that degrade pharmaceuticals.

Many More!

Clean, dry storage environments for everything from archival records to archeological samples—call to discuss your application!

Pallet; Dry Bulk Storage Drums

Place heavy canisters onto solid 304 stainless steel pallets for easier loading and unloading into/out of Terra's Humidity-Controlled Storage cabinets.

Available Accessories

Popular Accessories

For a full list of accessories, select a product then click Choose Accessories on that product page.
  • Relative Humidity Temperature Data Logger
    Battery-powered RH/Temperature Data Logger measures and records internal desiccator environment at specified intervals; download to a PC to meet QA/QC or regulatory requirements.
  • IsoDry Dual Purge
    Terra’s Dual Purge and NitroWatch relative humidity controllers maintain a low-RH set-point inside a desiccator or glove box; they provide variable purge control that ensures continuous positive pressure and eliminates nitrogen waste.
  • IsoDry NitroWatch Controller
    Dual Purge and NitroWatch RH Controllers work in tandem to maintain your low-humidity set-point and protect sensitive parts, without wasting N2 gas

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  • FasTrak 24/7 provides a 24/7 commitment to meet the shipping date YOU specify, regardless of quoted lead times.
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Call for pricing. FasTrak service fees cover costs of additional services only, without additional profit.

 * Terra's FasTrak services limited guarantee: to ship on the ESD or date specified OR to refund up to 100% of FasTrak charges. This guarantee covers no direct, special, consequential or other damages and is strictly limited to up to 100% of the amount paid for FasTrak service. When a specified ship date is missed due to factors outside Terra's control (vendor performance, deliveries by shipping companies, etc.) and random factors such as accidents, the credit of up to 100% of the FasTrak 24/7 may not apply. FasTrak service requested after order placement will be quoted and accepted based on available time remaining before required ship date.

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