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NitroPlex™ Multiplex Humidity Desiccators
Ordering Information

NitroPlex Desiccator  
Features Key

A Available for several desiccator lines (shown: acrylic Adjust-A-Shelf Desiccator)
B RH Control/Display Modules, mounted above each chamber, allow chamber-by-chamber set-point programming/display
Almost any Terra desiccator can be made into a NitroPlex™ Desiccator to cut nitrogen cost and increase efficiency!
See NitroPlex™ Overview
humidity level critical
Model shown: No. 3950-36DNP, with ten (10) control modules
(No. 1911-31C), 304 stainless steel door frames, and stand.
Click any price to add to cart.
Blue Prices show stock on hand. More . . .

Miniature LEDs display current humidity and RH set point
Miniature LEDs display current humidity
and RH set point
  • Increases desiccator efficiency up to 400% to minimize nitrogen waste and moisture exposure
  • Senses and displays relative humidity in each desiccator chamber independently for more efficient, cost-effective moisture control
  • Cuts nitrogen expenses by over 75%
  • Prevents moisture and contamination migration from one chamber to another
  • Lets you specify a different humidity set point for each chamber
  • Automatically delivers a high-flow nitrogen purge only to the chamber where it's needed, and only as long as it's needed to restore RH set point
  • Ergonomic design allows easy viewing, eliminates chamber lip for easier parts removal
  • Can be integrated into almost any Terra desiccator line

Increased Efficiency Lowers Recovery Time, Increases Yields
The NitroPlex™ system provides state-of-the-art automated humidity control to guarantee the integrity of stored components.

Each microprocessor-based multiplexed sensor/display module, one installed in each chamber, enhances desiccator performance and economizes on nitrogen expenses. It contains a miniaturized moisture sensor that reads the internal humidity level within ± 2% of full scale. The LED readout displays this value or the programmable set point for that chamber. The set point is adjustable from ambient to 0% RH (the unit does not increase moisture).

When the humidity climbs above the set point in any chamber, the NitroPlex automatically directs a high-flow purge of clean, dry nitrogen only to the chamber where it is needed, and only for as long as necessary to bring the humidity back below the set point value. An adjustable time delay maintains the high-flow purge for a short period of time--long enough to purge any moisture or contaminants that may have entered—and then shuts off, economizing on nitrogen use.

The Automatic RB® (Relief/Bleed) Valve, installed on each chamber, ensures that moisture and contaminants quickly exit the chamber into which they enter and do not migrate to others.

The Automatic RB® Valve thus helps maintain an ideal storage environment while protecting the cabinet against overpressures.

Status alarms are included in each NitroPlex module to warn the user if any door is left open or if the system has been in high purge mode too long, a condition that could indicate an interruption in the gas supply.

This ultra-efficient purging system ensures that your desiccator system maintains the conditions you specify, even during periods of frequent access or very high ambient humidity. Each time a part is accessed and a door closed the system recovers the desired humidity level in a fraction of the time required by conventional systems (see related sidebar). This reduced recovery time eliminates the risk of moisture-related damage to even the most sensitive parts.

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?

Dimensions: 1.5"W x 2.75"D x 1.5"H (38 mm x 70 mm x 38 mm); increases height of affected
(Humidity Module) chamber by 1.25" (32 mm).
Housing Material: 304 Stainless steel (chamber humidity modules).
Power Requirement: 110VAC, 50/60Hz or 220VAC, 50Hz (universal power supply)
Display: 5-digit LED
Display Resolution: ± 0.1% RH
Sensor Accuracy: ± 2%RH @ 20°C
Measuring Range: 0 - 100% RH
Calibration: None required for standard accuracy range.
Ordering Information
You can convert any of Terra's standard desiccators into a NitroPlex™ System simply by adding an "NP" to the desiccator part number. Then, order one NitroPlex™ module (Cat. No. 1911-31A) for each desiccator chamber.

Example: Cat. No. 3950-36NP is a NitroPlex™ version of Terra's standard Adjust-A-Shelf desiccator. To complete the order, specify (10) chamber sensor/display modules.

  Cat.# Price
NitroPlex Module 1911-31C $ 1,386

Includes humidity sensor, 5-digit LED display, Automatic RB® Valve, and gas plumbing. Order one per chamber.

Many Other NitroPlex™ Systems Available!

Pick a cabinet from any of these desiccator lines as your NitroPlex™ desiccator.
Plastic Cabinets:
  Adjust-A-Shelf™ Desiccators
  Tape-and-Reel™ Desiccators
Stainless Steel Cabinets
  Series 400 Desiccators
Whichever cabinet you select, order one NitroPlex™ module for each desiccator chamber. Add "NP" to the standard desiccator part number.
Nitroplex desiccators illustration
NitroPlex Desiccators
Specifications NitroPlex™ Desiccators
Overall Dim.
W" x D" x H"
Static Dissipative PVC Clear Acrylic
Cat. # Price Cat. # Price
A 45 x 24 x 60
(1143 x 610 x 1524)
per tier
3950-06DNP $ 9,764 3950-36DNP $ 6,310
34 x 18 x 60
(864 x 457 x 1524)
3950-07DNP $ 7,552 3950-37DNP $ 5,576
45 x 18 x 60
(1143 x 457 x 1524)
3950-08DNP $ 8,595 3950-38DNP $ 6,108
B 22.625 x 24 x 60
(575 x 610 x 1524)
One chamber
per tier
3950-18DNP $ 6,032 3950-48DNP $ 3,872
17.125 x 18 x 60
(435 x 457 x 1524)
3950-19DNP $ 3,099 3950-49DNP $ 2,518
22.625 x 18 x 60
(575 x 457 x 1524)
3950-20DNP $ 5,121 3950-50DNP $ 3,437
Corresponding Accessories

For Desiccators above

Corresp. Stainless
Steel Shelves
Corresp. Stands
(leveling feet incl.)
Perforated Shelf Stainless Steel
4" (102 mm) High
Cat. # Price Cat. # Price
3950-06DNP 3950-36DNP 1740-92 $ 748
3950-07DNP 3950-37DNP 1976-02 $ 161 1740-94 $ 706
3950-08DNP 3950-38DNP 1977-02 $ 179 1740-96 $ 728
3950-18DNP 3950-48DNP 1978-02 $ 191 1740-44 $ 502
3950-19DNP 3950-49DNP 1976-02 $ 161 1740-48 $ 426
3950-20DNP 3950-50DNP 1977-02 $ 179 1740-52 $ 465
RH/Temperature Data Logger
RH/Temperature Data Logger
Provides a convenient record of storage conditions! Placed in a desiccator or glovebox, this compact device accumulates humidity and temperature data at specified intervals for hours, days, weeks, even months. USB connection lets you import and display data in several formats.
Cat. # Price
9500-10 $ 240

File Type File Name Publication Date
White Paper (PDF) On-Site Nitrogen Generation: Cheaper, Easier, More Reliable
Learn how on-site nitrogen generation saves money by not having to order canisters of inert gas for desiccators, glove boxes and analytical instruments. You can make your own purified nitrogen from compressed air using a sophisticated membrane module (find out how it works!).
Tech Resource (PDF) Which Nitrogen Control System?
A comparative guide to Terra’s control system features and benefits.
Manual (PDF) Desiccator Cabinets and RH Controllers: Doc. # 1800-40
This manual provides installation and operating instructions for the following Terra desiccator lines: Adjust-A-Shelf, Pass-through, Wafer Box, Kitticator, Tape and Reel, Farracator and Series 100 through 400. The manual also covers the following RH Controllers: Flowmeter, Dual Purge System and NitroWatch.
Manual (PDF) NitroPlex RH Control System: Doc. # 1800-38
This manual is a supplement to Doc. #1800-40 and contains installation and operating instructions for the NitroPlex RH Control System.
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