Terra Part # 3950-73DNP
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Accessories related to Terra Part # 3950-73DNP
67985
Desiccator; Adjust-a-Shelf, NitroPlex, Amber Acrylic, 3 Chambers, 18" W x 18" D x 39.5" H
  • Desiccator cabinet with automatic, multi-chamber humidity control, down to 0% RH
  • Top-tier protection of moisture-sensitive components for longer shelf life and lower rejection rates
  • Separate RH sensors in each chamber provide chamber-by-chamber set-point programming and display
  • Simultaneously minimizes operating costs by only supplying nitrogen gas where and when it’s needed
  • Isolated chambers eliminate impact of moisture influx on other chambers when one door opens
  • NitroPlex™ desiccator cabinet control system drastically speeds up system recovery time for the most demanding low-humidity applications, when every second of moisture exposure counts.
  • The automatic humidity control system monitors and displays relative humidity in each individual chamber for faster set-points and improved efficiency with reduced consumption of nitrogen gas.
  • How Nitroplex™ System Works:
  • High-accuracy, miniaturized humidity modules are installed in each chamber of the cabinet to provide independent monitor/control capability.
  • Each module is programmable to maintain a humidity set point from ambient down to 0%RH. Each module also features a miniature fan with super silent micro-motor technology to help mix and circulate nitrogen in the chamber.
  • Nitrogen is directed only where and when it’s needed to keep the %RH level below the user-specified set-point.
  • The influx of nitrogen gas pressurizes a chamber, 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 a door is opened, or when the relative humidity (RH) climbs above set-point level, the system re-activates high-flow to accelerate moisture removal.
  • The LED displays on a module will flash warning signals any time a chamber’s door is left open for too long or if the system remains in purge mode for too long.
  • ESD-Safe Design:
  • Grounding is not standard on all designs, choose static-control options/designs to protect sensitive materials against ESD.
  • Conforms to DOD Handbook 263, MIL-SPEC 1686 and 1772 with selection of proper accessories.
  • Cabinet Design:
  • Amber acrylic construction provides full transparency while blocking out UV and blue light to protect light sensitive products or pharmaceuticals from photooxidation.
  • CAUTION: Acrylic is damaged by alcohol and many other cleaning agents. Use only water and mild detergent.
  • 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 inside the nitrogen dry box; Shelves can also be removed and used as carrying trays.
  • Dual-side access nitrogen cabinet options available.
  • 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 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.
  • Requires:
  • (1) NitroPlex™ module per chamber
  • Optional Accessories:
  • Nitrogen generator: provides a continuous, reliable supply of pure, dry nitrogen to eliminate dependence on bulky canisters.

Chamber Dimensions: 16.625" W x 15.875" D x 12.5" H

Window Material: Amber Acrylic

Material: Amber Acrylic

Opening Dimensions: 16" W x 10.75" H

Access: Single-Side Access

Number of Chambers: 3

Model: Adjust-A-Shelf, NitroPlex

Design: Benchtop

Chamber Width: 16.625"

Chamber Depth: 15.875"

Chamber Height: 12.5"

Humidity Control: Chamber Level

Door Design: Leak Tight

Unit of Measure: EA

Marks & Listings: CE, UL, ULC

Electrical Specifications: 120/240 V, 0.96 A, 1 Ph, 50/60 Hz

Weight, Product: 50 lb

Dimensions, Product: 18" W x 18" D x 39.5" H

Weight, Shipping: 125 lb

Dimensions, Shipping: 23.5" W x 47" D x 23.5" H

Package Type: Crate

Buy Accessories
  1. Provides chamber-level humidity monitor/control inside Terra desiccators | 1911-31C displayed
    $2,180
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  2. Shelf supports ensure that this plastic chamber holds weight | 2200-21 displayed
    $128
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  3. Adjustable shelves support weight loads of up to 90 pounds. | 1976-04 displayed
    $282
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  4. Stainless steel shield, installed on the floor of a plastic desiccator chamber, protects against scratching | 1976-06 displayed
    $282
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  5. Stainless Steel and powder-coated steel stands adjust to fit cabinets, desiccators and cleanroom equipment of any size. | 1609-20 displayed
    $578
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  6. Small 12"H powder-coated steel desiccator stand; optional casters simplify positioning and cleaning
    $590
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  7. Small 4"H stainless steel desiccator stand; optional casters simplify positioning and cleaning
    $717
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  8. Small 12"H stainless steel desiccator stand; optional casters simplify positioning and cleaning
    $735
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  9. Stainless steel LiftLatch. Product details may differ. | 1603-67-2 displayed
    $105
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  10. Small (4") locking latch, catcher included. Grid shows one-inch squares. | 1603-80 displayed
    $108
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  11. Stores 16,382 temperature readings and 16,382 relative humidity measurements. | 9500-10 displayed
    $252
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  12. Portable Nitrogen generator, 24"W x 12"D x 49.25"H, with compact footprint produces up to 99% pure N2 gas | 2700-11B displayed
    $12,188
    Increase Down Increase Up
  13. Increases security of desiccators and accommodates most standard padlocks. | 1603-33 displayed
    $46
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  14. Installed grounding terminal; location may vary depending on product | 1686-12 displayed
    $160
    Increase Down Increase Up
  15. Ionizing module safely neutralizes static charges in pressurized desiccator cabinets | 2006-01 displayed
    $1,583
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  16. FasTrak 24-7 Expediting Service
    Request Quote
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  17. UL Listing Declaration for Desiccator and Storage Cabinets
    Request Quote
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  18. Qualification Documentation (IQ/OQ) for Terra Universal System
    Request Quote
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  19. Equipment Testing
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  20. Terra's Automated RB Valve provides safe pressure release and prevents influx of room air | 1600-60B displayed
    $141
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  21. 1504-01-rack-storage-chamber-EPSS | 1504-01 displayed
    $33
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  22. Small (4") LiftLatch with Catcher | 1603-84 displayed
    $170
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NitroPlex™ Multiplex Humidity Desiccators

Standard Features

  • A Multiple Configurations
    Available for several desiccator lines (shown: acrylic Adjust-A-Shelf Desiccator)
  • B RH Control Module
    RH Control/Display Modules, mounted above each chamber, allow chamber-by-chamber set-point programming/display

NitroPlex Desiccator Cabinets

  • Desiccators: Features and Design overview
  • Leveling your Desiccator
  • Video Overview of Stainless Steel Desiccator Cabinets Stainless Steel Desiccator Cabinets
  • Plastic Nitrogen-Purged Desiccator Cabinet with Automated Humidity Control NitroPlex Desiccators Cabinet: Chamber-Level Humidity Control
  • Stainless Steel Desiccator Cabinets with Chamber-Level Humidity Control Series 400 Stainless Steel Desiccator Cabinets
Video Overview of Stainless Steel Desiccator Cabinets

Features and Benefits

NitroPlex Explained

NitroPlex™ Multiplex Humidity Desiccators Overview

Terra’s NitroPlex™ Desiccator Control System optimizes nitrogen purge efficiency for the most demanding applications, when every second of moisture exposure counts.

The NitroPlex™ is the only humidity control system that combines the monitoring and control capabilities required in zero-tolerance applications with miniaturized semiconductor components, bio/pharmaceutical samples and other moisture-sensitive materials.

Chamber-by-Chamber Multiplexed %RH Monitor/Control

A separate high-accuracy, miniaturized humidity module in each desiccator chamber provides independent monitor/control capability. Each module can be programmed locally or remotely to maintain a humidity set point from ambient down to 0%RH.

Nitrogen is directed only where needed to keep the %RH level below the critical set point.

Cuts System Recovery Time to Seconds

Desiccators controlled by a flowmeter may require an hour or more to regain a humidity set point after a chamber access door is opened. When doors are opened repeatedly, humidity levels can remain above the critical set point for an entire work day.

Testing shows that the NitroPlex™ cuts this recovery time by over 400% in a 4-chamber desiccator (see sidebar below). In Terra's Microccator™ this recovery time is cut to a matter of seconds, eliminating moisture-caused damage.

Product Safety Alarm

The NitroPlex™ eliminates another common cause of moisture exposure: access doors mistakenly left open or ajar. The system directs a high-flow nitrogen purge to any chamber the moment its door is opened. If the door remains opened longer than a specified delay time, the NitroPlex™ issues warning alarms to alert personnel to the problem.

Performance Improvements Spell Big Savings

NitroPlex™ Cuts N2 Costs by over 75%, Improves Efficiency by 400% A desiccator with only one bleed valve may cause more harm than good.

Once an access door is opened, any moisture that enters a cabinet will tend to migrate from one chamber to the next until it exits the cabinet through a bleed valve. In a large, multi-chamber cabinet with only one bleed valve, the moisture may contaminate several chambers.

Even a desiccator equipped with Terra Dual Purge™ and NitroWatch® systems may require 40 minutes or more to purge the moisture and recover the desired humidity set point (see test results at right). In this test, the top chamber of a four-chamber desiccator was exposed to moisture until the humidity level reached 97%RH. Figure 1 (on graph) represents the desiccator efficiency when it was equipped with a single Automatic RB® Valve located in the bottom chamber. The system required 40 minutes to bring the humidity level down to the 10% set point.

If, during that period, another door is opened, this recovery time will be extended further. Very possibly, the cabinet might fail to reach its programmed RH set point over the course of an entire shift, or even longer.

Simply by installing Terra's Automatic RB® (Relief/Bleed) Valve in each desiccator chamber, you can cut both the system recovery time and the nitrogen consumption in half. This is the test case represented by Figure 2 on the graph. Only 20 minutes—and only half as much nitrogen--were required to bring the humidity level to the set point.

The final test case (Figure 3) included a NitroPlex™ control system. With this set up, the desiccator required only 10 minutes to bring the RH from 97% to the set point level of 10%—only a fourth the time required in the first test. It consumed only 15 cubic feet (.42 cubic meters) of nitrogen, only 13% of the amount used in the first test case.

This nitrogen saving alone, nearly 77% in this test, justifies investment in a NitroPlex control system.


Fig. 1: Dual Purge™/NitroWatch® Systems, One Automatic RB® Valve
Moisture migrates through cabinet

Fig. 2: Dual Purge™/NitroWatch® Systems, Four Automatic RB® Valves
Moisture migratation eliminated

Fig. 3: NitroPlex™ System
Efficient moisture removal, reduced N2 use
What's Your Application?

The standard NitroPlex™ system provides unsurpassed moisture control in dozens of storage applications. Temperature, gas or biological sensors expand the range of critical operations.

  • Microelectronics components, SMDs, hybrid packages
  • Storage of PCBs for rework
  • Pharmaceutical R&D studies
  • Kitting of high-precision watch components
  • Pass-through transfer of night-vision electronics
  • Lithium battery development
  • Humidity testing of cosmetics
  • Accelerated life testing of ICs
  • Animal inhalation and toxicology research

Which critical control application can you find in your facility?

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.

Automatic RB Valve

During normal operation, it allows a continuous low-level release of gas to maintain a positive pressure. It also functions as a check valve to ensure that air and contaminants cannot enter the enclosure in the event of a momentary negative pressure.

NitroPlex™-Ready for Critical RH Control

UL-listed NitroPlex™ module automatically monitors and maintains low-RH set point to protect delicate samples while conserving nitrogen purge gas.

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

NitroPlex Humidity Control Modules

NitroPlex systems feature individual humidity sensors with LED displays above each chamber door. Each sensor can be programmed with a different humidity set-point level.

Stainless Steel Desiccator Cabinet with Racks and Shelving

All-stainless steel Series 400 Desiccator cabinets include stainless steel wire racks and a perforated pull-out shelf; order additional perforated or non-perforated shelves to suit storage requirements.

Individual RH control for Each Chamber

NitroPlex automated system for each chamber controls RH levels down to 1%. Directs nitrogen to individual chambers to maintain their humidity levels below set point. Cuts operational cost by reducing nitrogen consumption; protects products by cutting RH recovery time and moisture exposure.

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

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

Comprehensive Product Portfolio

Terra’s comprehensive product portfolio includes solutions for every application and budget. Our technical sales staff will guide you toward the product most suitable for your requirements.

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.

Catalog of CE-Marked Products

Terra offers over 1,700 CE-marked products configured for international voltage requirements

Popular Accessories

For a full list of accessories, select a product then click Choose Accessories on that product page.
  • 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.
  • 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)
  • 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.
  • Desiccator Cabinet Ionizing Module
    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.

On a tight schedule? Choose FasTrak 24/7 Priority Service to help meet your critical schedule for Terra-manufactured products, either before or after your order is placed.*

  • FasTrak 24/7 provides a 24/7 commitment to meet the shipping date YOU specify, regardless of quoted lead times.
  • FasTrak 24/7 assigns a dedicated production team plus a dedicated senior expeditor working three shifts to meet your delivery specification.
  • FasTrak 24/7 guarantees* to meet the agreed-to specified ship date.

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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