Adjust-A-Shelf Desiccators

• Durable, efficient nitrogen-purged storage cabinets from the industry-leading desiccator dry cabinet manufacturer
• Automatically maintains clean, dry, static-safe conditions to reduce part defects and extend product yields
• Optional smart humidity controllers provide unsurpassed efficiency to reduce nitrogen costs and maintain a constant, traceable clean, dry environment—
• SmartDesiccator™ nitrogen cabinets incorporate humidity sensor/display module into benchtop cabinets
• NitroPlex™ dry nitrogen cabinets provide multiplexed nitrogen control for optimal efficiency in larger desiccators
• Unique design and fabrication techniques produce durable, tight-sealing nitrogen cabinets
• Plenum chamber minimizes backfill, ensures uniform gas distribution
• Optional Automatic RB® (Relief/Bleed) Valve stabilizes internal pressure, protects dry cabinet doors and seals
• Full line of standardized sizes and components simplifies parts replacement
• Optional 304 stainless steel doors extend cabinet's service life and improve sealing performance
• Chrome-plated racks allow shelf placement at one-inch increments (electropolished stainless steel available)
• Locking LiftLatches™ open and close without straining doors, provide lock-out security
• Static-control options protect sensitive materials against ESD
• Grounded rack and door latch and built-in grounding terminals provide additional ESD safety
• Conforms to DOD Handbook 263, MIL-SPEC 1686 and 1772 with selection of proper accessories

Versatile Shelf Options
a variety of shelves. Shelves can be positioned at .5" increments to accommodate different part sizes; they can also be removed and used as carrying trays. Grounding terminals are included standard on all Static-Dissipative PVC desiccators, allowing you to ground racks and shelves. Grounding is optional on acrylic chambers. Note: Electropolished 304 stainless steel racks are available.

Acrylic shelves feature stainless steel BowGuards™ that support up to 35 lbs.

304 Stainless steel shelves, which support loads up to 45 lbs., are available with perforations to facilitate gas flow. Their slight depth (.5") provides a retaining lip along all edges.

304 Stainless steel trays are 2.625" deep and so offer more roomy, secure storage space than shelves. They also provide optimal ESD protection. When grounded stainless steel shelves or trays are placed immediately above each other, they create a Faraday cage that completely blocks out electrostatic charges. Trays are also convenient for carrying parts after they are removed from the desiccator.

304 Stainless steel shields are designed to protect plastic chambers from scratching. They are highly recommended for installation on static-dissipative PVC chambers, which can, after repeated scraping and rubbing, lose their dissipative characteristics.

IC Tube Inserts
These versatile storage fixtures adapt a standard Adjust-A-Shelf™ Desiccator chamber for IC tube storage.

Each fixture includes four horizontal shelves (spaced 1.25 " apart) with slots that allow vertical insertion of dividing rods. These rods let you form bin sizes to accommodate IC tubes of many dimensions. Select stainless steel shields to prevent scratching (one shield is recommended for each dissipative PVC shelf). Spaces are provided for bin labels.

Static Control Solutions
Even the slightest static discharge can spell disaster for today's delicate 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
   Acrylic, the most common plastic used in storage enclosures, is a prolific static generator. The act of cleaning an acrylic desiccator with a cleanroom wiper is enough to generate surface charges that can discharge onto semiconductor components. One way to avoid potentially disastrous static damage is to select Static-Dissipative PVC.

This material not only dissipates static charges safely, but it also eliminates the particle attraction that static charges create. Surfaces stay clean, inside and out, making this material perfect for use in Class 1 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 107 ohms per square, placing it in the "dissipative range". It 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. Self-Balancing 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.