Terra Universal

Adjust-A-Shelf™ Desiccator Cabinet with 2 Chambers, 24" x 23" x 24"

Versatile Adjust-A-Shelf™ desiccator cabinets protect your moisture-sensitive materials and eliminate harmful electrostatic discharge and particulate contamination. One-piece door gaskets inhibit outgassing while the LiftLatches™ prevent metal-on-metal scraping common with rotary latches. Illustration dimensions are inches (mm).

  • 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
  • Unique design and fabrication techniques produce durable, tight-sealing nitrogen cabinets
  • Plenum chamber minimizes backfill, ensures uniform gas distribution
  • Automatic RB® (Relief/Bleed) Valves stabilizes internal pressure, protects dry cabinet doors and seals
  • Adjustable flow meter allows regulation of incoming nitrogen flow rate
  • Full line of standardized sizes and components simplifies parts replacement
  • Doors with type 304 stainless steel frames extend cabinet's service life and improve sealing performance
  • Electropolished stainless steel wire racks allow shelf placement at 1" increments
  • Perforated (one included per chamber) or solid shelves help organize items and efficiently use chamber space
  • 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

Starting At: $1,705.52

Price as configured: $0.00

Adjust-A-Shelf™ Desiccator Cabinet with 2 Chambers, 24" x 23" x 24"

More Views

  • 3950-39B Adjust-A-Shelf™ Clear Acrylic Desiccator Cabinet, 24" x 23" x 24"
  • 3950-69B Adjust-A-Shelf™ Amber Acrylic Desiccator Cabinet, 24" x 23" x 24"
  • 3950-09B Adjust-A-Shelf™ Static Dissipative PVC Desiccator Cabinet, 24" x 23" x 24"
  • Terra Universal Adjust-A-Shelf™ Static Dissipative PVC Desiccator Cabinet with Doors Open

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Price as configured: $0.00


Versatile Shelf Options

Terra offers a variety of shelf solutions. Shelves can be positioned at 0.5" (13 mm) 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.

Terra Universal desiccator with stainless steel shelf and stainless steel tray
Top: Stainless steel shelf
Bottom: Stainless steel tray
Terra Universal desiccator with acylic shelves with and without stainless steel BowGuards
Top: Acrylic Shelf with BowGuards™
Bottom: Acylic Shelf without BowGuards™

Acrylic shelves feature stainless steel BowGuards™ that support up to 35 lbs (15.9 kg).

Electropolished type 304 stainless steel shelves, which support loads up to 45 lbs (20.4 kg), are available as solid or with perforations to facilitate gas flow. Their slight depth, 0.5" (13 mm), provides a retaining lip along all edges.

Electropolished type 304 stainless steel trays are 2.625" (67 mm) 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.

Electropolished type 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.

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.

Terra Universal desiccator stainless steel sheild diagram
Faraday cage protects shelf contents against ESD

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 non-conductive 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.

As the illustration depicts, 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.

Desiccator Grounding
All Terra desiccators are made of static dissipative PVC feature grounding terminals on a standard basis. The surface resistivity of this material (around 107 ohms/square) allows controlled dissipation of static charges from any surface in the cabinet, including shelves. Conductive grounding connections safely direct charges to a grounding terminal (standard on static dissipative PVC cabinets; order separately for acrylic cabinets below).

Terra Universal Desiccator LockLatch

LatchLock® for Single Chamber Width Desiccators

  • Increase security of any desiccator equipped with Terra's standard LiftLatch®
  • Stainless steel locking bracket installs on standard Terra LiftLatch® assembly
  • 0.375" (10mm) holes accommodate most standard padlocks (padlock not included)
  • Installation included

Don't risk operational delays because of a damaged door.
Terra's desiccators last indefinitely. Doors, however, are subject to damage, and ordering a legacy replacement can be costly and disrupt operation. Avoid these problems by ordering replacement doors at the time you purchase the desiccator. Contact us for details.

Terra Universal Standard Adjust-a-Shelf™ Desiccator Cabinet with OptionsStandard Adjust-A-Shelf™ Desiccator Cabinets (Model Shown: No. 3950-36 with options)
Terra Universal 3950-45D desiccator shown with stainless steel shelves, humidity control and standNo. 3950-45, shown with electropolished stainless steel shelves, humidity controls and stand.
Terra Universal 3950-45D desiccator shown with stainless steel shelves, humidity control and standNo. 3950-48, shown with optional electropolished type 304 stainless steel shelves, humidity controls and stand.

Additional Information

CleanPro Part Number K101776
Brand Terra Universal
Type Manual Purge Dry Gas
Capacity 2 Chambers
Mount Freestanding
Model / Series Adjust-A-Shelf™