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Terra Part #PriceShips in
Benchtop Acrylic 3 16.625" 16.125" 11.625" 3950-43F-ISO 70705 $2,63925-31 Days2
Benchtop Acrylic 3 22.125" 16.125" 11.625" 3950-44F-ISO 70706 $2,92125-31 Days3
Benchtop Acrylic 3 22.125" 22.125" 11.625" 3950-42F-ISO 70704 $3,15725-31 Days4
Benchtop Static Dissipative PVC 3 16.625" 16.125" 11.625" 3950-13F-ISO 70681 $3,43225-31 Days5
Benchtop Static Dissipative PVC 3 22.125" 16.125" 11.625" 3950-14F-ISO 70682 $3,7991-3 Days6
Benchtop Static Dissipative PVC 3 22.125" 22.125" 11.625" 3950-12F-ISO 70680 $4,10525-31 Days7
Floor Acrylic 4 16.625" 16.125" 11.625" 3950-46F-ISO 70708 $3,20525-31 Days8
Floor Acrylic 4 22.125" 16.125" 11.625" 3950-47F-ISO 70710 $3,55125-31 Days9
Floor Acrylic 4 22.125" 22.125" 11.625" 3950-45F-ISO 70707 $3,83725-31 Days10
Floor Acrylic 6 16.625" 16.125" 11.625" 3950-31F-ISO 70696 $4,38725-31 Days11
Floor Acrylic 6 22.125" 16.125" 11.625" 3950-32F-ISO 70697 $4,84025-31 Days12
Floor Acrylic 6 22.125" 22.125" 11.625" 3950-30F-ISO 70695 $5,21825-31 Days13
Floor Acrylic 8 16.625" 16.125" 11.625" 3950-34F-ISO 70699 $5,53925-31 Days14
Floor Acrylic 8 22.125" 16.125" 11.625" 3950-35F-ISO 70700 $6,09725-31 Days15
Floor Acrylic 8 22.125" 22.125" 11.625" 3950-33F-ISO 70698 $6,56325-31 Days16
Floor Acrylic 10 16.625" 16.125" 11.625" 3950-37F-ISO 70702 $6,59825-31 Days17
Floor Acrylic 10 22.125" 16.125" 11.625" 3950-38F-ISO 70703 $7,2471-3 Days18
Floor Acrylic 10 22.125" 22.125" 11.625" 3950-36F-ISO 70701 $7,7861-3 Days19
Floor Acrylic 5 16.625" 16.125" 11.625" 3950-49F-ISO 70712 $3,96025-31 Days20
Floor Acrylic 5 22.125" 16.125" 11.625" 3950-50F-ISO 70713 $4,36725-31 Days21
Floor Acrylic 5 22.125" 22.125" 11.625" 3950-48F-ISO 70711 $4,73525-31 Days22
Floor Static Dissipative PVC 4 16.625" 16.125" 11.625" 3950-16F-ISO 70684 $4,16725-31 Days23
Floor Static Dissipative PVC 4 22.125" 16.125" 11.625" 3950-17F-ISO 70685 $4,61725-31 Days24
Floor Static Dissipative PVC 4 22.125" 22.125" 11.625" 3950-15F-ISO 70683 $4,98925-31 Days25
Floor Static Dissipative PVC 6 16.625" 16.125" 11.625" 3950-01F-ISO 70672 $5,70525-31 Days26
Floor Static Dissipative PVC 6 22.125" 16.125" 11.625" 3950-02F-ISO 70673 $6,29325-31 Days27
Floor Static Dissipative PVC 6 22.125" 22.125" 11.625" 3950-00F-ISO 70671 $6,78325-31 Days28
Floor Static Dissipative PVC 8 16.625" 16.125" 11.625" 3950-04F-ISO 70675 $7,31625-31 Days29
Floor Static Dissipative PVC 8 22.125" 16.125" 11.625" 3950-05F-ISO 70676 $8,04425-31 Days30
Floor Static Dissipative PVC 8 22.125" 22.125" 11.625" 3950-03F-ISO 70674 $8,5321-3 Days31
Floor Static Dissipative PVC 10 16.625" 16.125" 11.625" 3950-07F-ISO 70678 $8,69325-31 Days32
Floor Static Dissipative PVC 10 22.125" 16.125" 11.625" 3950-08F-ISO 70679 $9,5381-3 Days33
Floor Static Dissipative PVC 10 22.125" 22.125" 11.625" 3950-06F-ISO 70677 $10,2371-3 Days34
Floor Static Dissipative PVC 5 16.625" 16.125" 11.625" 3950-19F-ISO 70693 $5,14625-31 Days35
Floor Static Dissipative PVC 5 22.125" 16.125" 11.625" 3950-20D-ISO 67322 $4,7011-3 Days36
Floor Static Dissipative PVC 5 22.125" 22.125" 11.625" 3950-18F-ISO 70689 $6,1571-3 Days37
Floor Static Dissipative PVC 5 22.125" 16.125" 11.625" 3950-20F-ISO 70694 $5,67725-31 Days38
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Product Details

• Desiccator cabinet with gas dilution fans for fast, uniform moisture removal, down to 0%RH

• Dilution fans quickly and efficiently mix nitrogen through cabinet to reduce N2 consumption

• Eliminates moisture "blind spots" that cause large RH deviations between different chambers

• Automatic humidity control system continuously monitors user-specified RH set-point inside cabinet

• Ideal for applications that permit chambers to share the same air throughout cabinet

• IsoDry® desiccator cabinets incorporate a unique, patented nitrogen purge system to achieve faster and more uniform low-humidity conditions throughout the cabinet.

• The desiccator cabinet includes a moisture sensor that connects to a separate automatic RH control system to maintain sub-ambient, user-specified humidity threshold down to 0% RH.

How Isodry® System Works:

• High-purity nitrogen gas feeds into the desiccator cabinet and is mixed by built-in fans with existing air inside the cabinet.

• The gas dilution fans continuously circulate and mix dry nitrogen throughout the cabinet to eliminate moisture “blind spots” and further dilute moisture present inside the cabinet.

• When a door is opened, the door sensor triggers the fan to turn off to prevent outside air from being circulated through the cabinet. When the door is closed: the fans turn back on to accelerate removal of moisture-laden air.

• 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.

• All chambers within the cabinet share the same air and thus share the same humidity level of the cabinet (+/- 3% RH from set point at ideal conditions).

• Grounding is not standard on all designs, choose static-control options/designs to protect sensitive materials against ESD.

• 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.

• Conforms to DOD Handbook 263, MIL-SPEC 1686 and 1772 with selection of proper accessories.

Cabinet Design:

• 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.

• Optional locking lift latches also available - specify one per chamber.

• 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.


• Gas dilution module requires connection to IsoDry® humidity controller for operation: either IsoDry® Dual Purge System and IsoDry® NitroWatch®, or IsoDry® Smart® Controller (order either system separately).

Optional Accessories:

Nitrogen generator: provides a continuous, reliable supply of pure, dry nitrogen to eliminate dependence on bulky canisters.


• (1) Gas dilution module. Gas dilution module (24V) and sensor are pre-installed and pre-wired for quick connection with Terra’s automatic humidity control systems: DualPurge and NitroWatch®.

Marks & Listings: CE, UL, ULC

IsoDry® Desiccator Cabinets

Standard Features

  • A Gas Mixing Module
    Operates when doors are closed to promote uniform humidity levels throughout the cabinet
  • B Relief/Bleed (RB) Valve
    Prevents overpressure; acts as a check valve (one included per chamber)
  • C Reinforced Doors
    Stainless steel door frames include non-adhesive, non-outgassing, one-piece gaskets that won't creep or sag over extended use
  • D Grounding Terminals
    Standard on static-dissipative PVC chambers to prevent electro-static discharge (ESD)

Optional Features

  • 1 IsoDry Automatic Humidity Controllers
    Dual Purge and NitroWatch systems work in tandem to provide variable gas purge: high when needed to reach set point; low to conserve nitrogen
  • 2 Relative Humidity Sensor
    Allows real-time monitor/display of internal humidity level
  • 3 Stand
    Stands available in stainless or powder-coated steel, with casters for easy cabinet positioning
  • 4 Nitrogen Generator
    Nitrogen Generator provides a continuous, reliable source of nitrogen up to 99% pure
  • 5 Stainless-steel shelves and trays
    Adjustable in one-inch increments on stainless steel racks

IsoDry® Desiccator Cabinets

  • IsoDry® Desiccator Cabinet by Terra Universal
  • IsoDry® Desiccator Cabinet Airflow Visualization with Dry Ice

Features & Benefits

Features and Benefits

Smart Performance for Big Savings

IsoDry's forced dilution system drastically improves moisture removal to quickly and efficiently attain low RH set-points. At 10% RH setpoint, IsoDry cuts recovery time and Nitrogen consumption by 80% compared with an unassisted system.

Stainless Steel Racks for Adjustable Shelf Storage Desiccators

Unlike common chrome-plated hardware, durable electropolished stainless steel racks for adjustable shelf storage desiccators help maintain a contamination-free storage environment. They resist corrosion and chipping/scratching from the sliding removable shelves.

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 room air.

IsoDry Gas Dilution Module

IsoDry Gas Dilution Module enhances the relative humidity uniformity throughout the desiccator cabinet.

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.

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

Gas Dilution System Ensures Uniform Humidity

IsoDry Gas Dilution Module enhances relative humidity uniformity throughout the desiccator cabinet and speeds up moisture removal after doors are closed.

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.

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.

Highest Standards For Desiccators and Electronic Components

Terra’s desiccator cabinets and RH control systems are designed and built to the highest standards required by defense and semiconductor industries for long-term reliability and protection against damage, injuries, and electrical hazards.

Continuous Product Improvement

At Terra, we strive to develop and produce the highest quality products for our customers to improve health, safety, performance, and yields. Our product quality is enabled by high-grade manufacturing equipment and processes, 45 years of engineering and application expertise, and our commitment to continuously improve.

Long-Term Customers

Terra is committed to building long-term relationships with satisfied clients; 94% of orders each year come from repeat customers

Complete Project Transparency

Terra is dedicated to complete transparency on project status, shipment tracking, and installation scheduling

Smart® Desiccator Cabinet on Automatic Height Adjustable Workstation

Automatic height adjusting workstations allow users to quickly alternate between comfortable sitting and standing positions while performing different tasks with heavy equipment on the workspace, such as this Smart® Desiccator Cabinet connected to a Nitrogen Generator.

Available Accessories

Popular Accessories

For a full list of accessories, select a product then click Choose Accessories on that product page.
  • Laboratory Nitrogen Generator
    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.
  • 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)
  • 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.
  • Humidity and Temperature Data Logger
    Records storage conditions inside a Desiccator chamber-adjustable logging interval (hours to months), USB port for easy data download in several formats.

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Manuals & Resources

Manuals & Resources

Dual Purge and NitroWatch System for Desiccator Cabinets

Blog Post

Desiccator Cabinet Features Comparison

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