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Single chamber Static-Dissipative PVC Adjust-A-Shelf Desiccator Cabinet | 3950-21D displayed
Adjust-A-Shelf™ Desiccator Cabinets
Desiccator; Adjust-A-Shelf™, Static Dissipative PVC, 1 Chamber, 18" W x 18" D x 12" H
Terra Part #: 3950-21D
Manufactured By: Terra Universal
Warranty: 1 year parts, 90 days labor
LTL freight shipment. Dock or liftgate may be required.
Available Certified ISO Grade Designs: ISO 6, ISO 7, ISO 8
Nitrogen-purge desiccator cabinet provides versatile low-humidity storage down to 0% RH
Designed for moderate to critical RH control applications that require automatic low-humidity control
Ideal for storing moisture-sensitive materials: microelectronics, medical devices, pharmaceutical powders
Intakes constant feed of inert nitrogen process gas regulated by flow meter and RB valves
Upgrade to IsoDry® or Nitroplex™ for faster recovery times and more uniform low-humidity conditions
• Chamber Dimensions: 16.625" W x 16.125" D x 11.625" H
• Material: Static Dissipative PVC
• Opening Dimensions: 16.375" W x 10.75" H
• Number of Chambers: 1
• Model: Adjust-A-Shelf™
• Design: Benchtop
• Chamber Width: 16.625"
• Chamber Depth: 16.125"
• Chamber Height: 11.625"
• Humidity Control: Cabinet Level
• Door Design: Leak Tight
• Unit of Measure: EA
Read more
Terra Part #: 3950-21D
Manufactured By: Terra Universal
Warranty: 1 year parts, 90 days labor
LTL freight shipment. Dock or liftgate may be required.
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Summary
Available Certified ISO Grade Designs: ISO 6, ISO 7, ISO 8
Nitrogen-purge desiccator cabinet provides versatile low-humidity storage down to 0% RH
Designed for moderate to critical RH control applications that require automatic low-humidity control
Ideal for storing moisture-sensitive materials: microelectronics, medical devices, pharmaceutical powders
Intakes constant feed of inert nitrogen process gas regulated by flow meter and RB valves
Upgrade to IsoDry® or Nitroplex™ for faster recovery times and more uniform low-humidity conditions
Adjust-A-Shelf desiccator cabinets are designed for storage of moisture-, ESD-, and contamination-sensitive materials that require automatic low-humidity set-point control.
How Dual Purge™ and NitroWatch™ Work:
Dual Purge™ and NitroWatch™ are separate modules that mount on top of the desiccator cabinet. The combined system provides automatic humidity control from ambient down to 0% RH and helps conserve nitrogen.
NitroWatch™ monitors and displays RH readings from a single sensor mounted inside the cabinet. The Dual Purge™ uses two gas flow settings (high/low) to rapidly reach and then maintain the user-specified RH set-point.
High-flow is triggered when RH is above set-point, or when a door opens (triggered by magnetic door sensors). The high-flow setting helps expedite set-point recovery.
The influx of nitrogen gas pressurizes the cabinet, causing moisture-laden air to be displaced and released through the automatic relief/bleed (RB) valves. This steady bleed causes the concentration of dry nitrogen gas inside the desiccator to increase until the desired RH level is reached.
When the RH set-point is reached, the system reverts from high-flow to low-flow nitrogen gas supply to maintain the set-point and conserve nitrogen. When RH climbs above the set-point, the system re-activates high-flow to accelerate moisture removal.
ESD-Safe Design:
Static-dissipative PVC (SD-PVC) design features bonded dissipative layers that resist abrasion and retain surface resistivity of 106 - 108 ohms/square indefinitely (unlike spray-on coatings that can wear off after a few years). SD-PVC also eliminates static-cling to help maintain clean surfaces.
Grounding tape connects doors and shelf racks to terminal block to safely-discharge surface charges and eliminate the risk of electrostatic discharge.
Conforms to DOD Handbook 263, MIL-SPEC 1686 and 1772 with selection of proper accessories.
Cabinet Design:
Rear plenum for improved gas distribution: The gas inlet feeds into a narrow wall plenum adjacent to all chambers. The plenum pressurizes and simultaneously distributes gas through small perforations in the wall to each chamber in the cabinet.
Gas ports are factory installed for turn-key operation with Dual Purge™ and NitroWatch™ automatic RH control system.
Innovative wall-fusing technology creates a rigid, durable structure for improved weight capacity and resistance to high-frequency vibrations.
Automatic RB™ (Relief/Bleed) valves on each chamber relieve excess pressure inside the cabinet without allowing outside air or contaminants inside.
Stainless steel wire racks allow shelves to be positioned at 1" increments to accommodate different part sizes; shelves can also be removed and used as carrying trays.
Door Design:
Access doors with 304 stainless steel reinforced frames extend desiccator cabinet's service life and provide a tight seal.
Santoprene® "e"-shape non-outgassing rubber gasket firmly compresses to eliminate leaks. The one-piece resilient rubber gasket maintains its shape after compression and won't flatten, warp, crack, or degrade like ordinary foam gasket. Gasket is also mechanically attached to the door frame to avoid adhesive failure common with gasket tapes.
Heavy-duty lift latches prevent metal-on-metal scraping common with rotary latches; chrome-plated included standard; upgrade to all-stainless steel (304 or 316) to minimize scratching, corrosion and contamination resulting over time that can occur with chrome-plated latches.
Durable 304 stainless steel hinges eliminate corrosion, flaking, and contamination that commonly occur with ordinary chrome-plated hinges.
Order replacement door(s) to ensure uninterrupted service should a door ever be damaged and require replacement.
Optional Accessories:
Nitrogen generator: provides a continuous, reliable supply of pure, dry nitrogen to eliminate dependence on bulky canisters.
Locking lift latches help protect against unauthorized access - specify one per chamber.
Specifications
• Chamber Dimensions: 16.625" W x 16.125" D x 11.625" H
• Material: Static Dissipative PVC
• Opening Dimensions: 16.375" W x 10.75" H
• Number of Chambers: 1
• Model: Adjust-A-Shelf™
• Design: Benchtop
• Chamber Width: 16.625"
• Chamber Depth: 16.125"
• Chamber Height: 11.625"
• Humidity Control: Cabinet Level
• Door Design: Leak Tight
• Unit of Measure: EA
• Marks & Listings: CE, UL, ULC
• Weight, Product: 30 lb
• Dimensions, Product: 18" W x 18" D x 12" H
• Weight, Shipping: 73 lb
• Dimensions, Shipping: 23.5" W x 23.5" D x 19.5" H
• Package Type: Palletized
Features and Benefits
Reinforced Doors with Non-adhesive Gaskets
Stainless steel door frames extend desiccator life; one-piece fused gaskets are non-outgassing, will not creep or sag
Grounded, static-dissipative desiccator cabinets safely discharge surface charges to ground, eliminating the risk of electrostatic discharge and attractive forces that seize particles. Conductive tape connects the shelves, racks and doors to the grounding bar at the top of the cabinet.
Flow Meter Helps Monitor and Control Nitrogen Gas Flow
A flow meter is a low-cost option suitable for non-critical applications or small desiccators that do not require much inert gas. However, manual control is more prone to human error and not as efficient with the consumption of inert gas, which can lead to damaged products and high operating costs.
Durable Embedded Static-Dissipative Layers
Terra's SDPVC features bonded dissipative layers that resist abrasion. SDPVC desiccators retain their surface resistivity of 106 - 108 ohms/square indefinitely (unlike spray-on coatings that can wear off after a few years), protecting your materials against ESD damage. Further, the control of static charges eliminates particle attractions, helping maintain clean surfaces.
Desiccator Plenum Chamber For Uniform Gas Distribution
Multi-chamber desiccator cabinets include a perforated plenum to minimize back fill, ensure uniform gas distribution to all chambers and increase cabinet strength
Available Stainless Steel Shelves and Trays
Adjustable, non-contaminating shelves and trays slide on stainless steel racks, allowing easy parts access (one perforated shelf included)
High Caliber Hardware
Seemingly small details like latches, ports, glides and hinges are often overlooked or ignored by other manufacturers, and later become the point of costly recurring maintenance or equipment failure. Terra’s products are made of long lasting, cleanroom compatible, top tier hardware. Individual components are carefully designed and rigorously tested to guarantee the highest quality, durability, and craftsmanship.
Automatic Relief/Bleed Valve
Terra's Automatic Relief/Bleed (RB) Valve opens up at 0.01 PSI, relieving overpressure that could damage desiccators; also works as a check valve to prevent influx of outside air.
Doors - The First Failure Point of a Desiccator Cabinet
Terra’s stainless steel door frames eliminate the need for internal reinforcements, which create particle surfaces and compromise cleaning. Unlike other doors with glue-on anti-bow pieces, Terra’s doors use no adhesives. This eliminates particle traps, sources of outgassing—and extends the strength and service life of the desiccator.
Complete Order Transparency
Using Terra’s OnTrak system, our customers can view real-time production updates, receive shipment notifications and track their orders until they arrive at their facility
Product Prices Honored Worldwide
From Argentina to Zimbabwe, Terra's customers pay a single web-listed price for each product
Wide Selection of Global Shipping Options
Terra offers a broad range of global shipping services including door-to-door and white glove delivery. Each product is safely packaged in a heat-treated wooden crate that meets international shipping standards.
Catalog of CE-Marked Products
Terra offers over 1,700 CE-marked products configured for international voltage requirements
Products Tailored to Your Cleanroom Environment
Provide Terra with your desired ISO Grade design. We will tailor the product to meet your criteria and certify it with a report appended to your invoice. Certificate includes all the necessary information to streamline audits and facility compliance.
Rapid Drying of Hygroscopic Material
Terra's gas-purged desiccators utilize a rapid flow of inert nitrogen to quickly dry hygroscopic samples and components
Popular Accessories
For a full list of accessories, select a product then click Choose Accessories on that product page.
Universal base stands support and stabilize various equipment sizes. Adjustable telescoping members allow for a precise fit. Choose between stainless and powder-coated steel to fit your desired application.
Universal Stand Adjusts to Fit a Wide Range of Equipment
Terra's Universal stands easily adjust to fit a wide range of equipment. Multi-purpose stand frames are suitable for many types of cleanroom equipment, including refrigerators, freezers, incubators, ovens, and vacuum chambers.
3-inch Diameter Caster Set
Casters are easily retrofitted for mobility. Products can be rolled out of the way when cleaning or relocated as workflow changes.
Terra’s Nitrogen Generators provide a continuous, reliable supply of clean, dry nitrogen up to 99% pure to eliminate dependence on bulky canisters to operate desiccators and glove boxes.
Ionizing modules are available for desiccator cabinets, glove boxes and other enclosures to ensure static-safe storage and processing (shown: ionizing unit on 2-chamber desiccator)
Universal Adjustable Base Stands for Desiccator Cabinets and Cleanroom Equipment
Stainless steel or powder-coated steel base stands easily adjust to fit cabinets, desiccators and cleanroom equipment of any size or shape. Stands raises equipment to ergonomic height to ease disinfection and sample monitoring. BioSafe design suitable for any cleanroom or lab environment.
Records storage conditions inside a Desiccator chamber-adjustable logging interval (hours to months), USB port for easy data download in several formats.
Clean, Dry, ESD-Safe Transport Solutions
Configure BioSafe® cleanroom carts with built-in desiccator cabinets for highly sensitive biomedical materials. The nitrogen desiccator cabinet adds an extra layer of protection to provide a dry, inert environment. Amber acrylic filters out UV and blue light.
Dual Purge™ and NitroWatch™ Work Together to Fully Automate RH Control
Terra's Dual Purge™ and NitroWatch™ operate in tandem to precisely and automatically control the flow of nitrogen and maintain a preset humidity level (from ambient to 0% ± 1.5% RH), no matter how operating conditions may change.
Data Logging with 113,000 Readings at User Defined Intervals
Terra's Smart® IsoDry® Nitro-Watch™ logs RH, temp, door open/close, purge on/off, and sensor removal/attachment. The max data file size is roughly 4 MB or 113,000 readings. This is approximately 32 hours of data when logging at 1 second intervals, 2 weeks at 10 second intervals, 6 weeks at 30 second intervals, or 12 weeks at 1 minute intervals. When the system reaches the 4MB limit, data begins to wrap, overwriting oldest data with new.
Plug & Play Data Logging
Plug in a USB flash drive to your Smart® IsoDry® Nitro-Watch™ to transfer data in .CSV format. No software required.
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