IsoDry® Desiccator Cabinets
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Product Details
• Gas-purged, general purpose desiccators with high-uniformity automatic RH control systems
• Full cabinet RH control
• Acrylic or static-dissipative PVC
• 3 chambers; benchtop
• Chambers: 16.5 & 22" W, 16 & 22" D, 11.5" H
• Cabinets: 17 & 24" W, 19 & 25" D, 36" H
• IsoDry Humidity Control system offers greater RH uniformity and significantly speeds up RH recovery times
• IsoDry Gas Dilution Module (patent-pending) rapidly dilutes the air in the cabinet with dry nitrogen gas
• IsoDry Dual Purge system features both high- and low-flow operation for efficient use of nitrogen
• IsoDry NitroWatch controller features programmable set-point control and monitors humidity in the cabinet via the included RH sensor
• High-flow nitrogen gas purging activates when RH rises above the programmed set-point or when a door opens
• A flowmeter installed in the Dual Purge system delivers a slow, continuous flow of nitrogen to supplement the high-flow operation
• Automatic Relief/Bleed valve releases moisture-laden air from the chamber, speeding up dilution and preventing over-pressurization
• LED display shows the current relative humidity level for the entire cabinet
• Reduces moisture-related degradation of semiconductors and electronic components
• Provides a dry storage environment for medical devices, pharmaceutical powders, and other contamination-sensitive materials
• Ergonomic, stainless steel LiftLatches do not scrape the chamber like ordinary rotary latches
• Mechanically attached, one-piece gasket does not creep or crack
• Includes stainless steel-framed doors, one automatic RB (Relief/Bleed) valve per chamber, stainless steel wire racks, and one stainless steel perforated shelf
IsoDry® Desiccator Cabinets
Standard Features
- A Gas Mixing ModuleOperates when doors are closed to promote uniform humidity levels throughout the cabinet
- B Relief/Bleed (RB) ValvePrevents overpressure; acts as a check valve (one included per chamber)
- C Reinforced DoorsStainless steel door frames include non-adhesive, non-outgassing, one-piece gaskets that won't creep or sag over extended use
- D Grounding TerminalsStandard on static-dissipative PVC chambers to prevent electro-static discharge (ESD)
Optional Features
- 1 IsoDry Automatic Humidity ControllersDual 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 SensorAllows real-time monitor/display of internal humidity level
- 3 StandStands available in stainless or powder-coated steel, with casters for easy cabinet positioning
- 4 Nitrogen GeneratorNitrogen Generator provides a continuous, reliable source of nitrogen up to 99% pure
- 5 Stainless-steel shelves and traysAdjustable in one-inch increments on stainless steel racks
General Purpose Desiccators
Desiccators: Features and Design overview- Leveling your Desiccator
- IsoDry® Desiccator Cabinet, 8-chamber static-dissipative PVC
- IsoDry® Desiccator Cabinet, 6-chamber static-dissipative PVC
- IsoDry Desiccators
Features & Benefits
Features and Benefits
IsoDry Dual Purge/NitroWatch Systems
The complete IsoDry control system includes a relative humidity sensor mounted inside the chamber and a Terra's IsoDry Dual Purge and NitroWatch systems, which work in tandem to ensure fast set point recovery times (see graph above).
The Dual Purge system provides a high-volume burst of nitrogen to attain the RH set point upon system set-up. Once this set point is attained, it uses an economical low-flow purge to maintain the set point, and then activates the high-flow purge the minute a door opens to recover set point with minimal nitrogen waste. The NitroWatch provides continuous monitor/display of both measured RH and set point levels.
Status alerts built into the IsoDry Dual Purge System warn if incoming nitrogen line pressure falls below operational rates (signaling an interruption in the gas supply) or if the system remains in high-flow purge for an excessive period (signaling a door left ajar). This integrated system also provides the low-voltage power required by the IsoDry and a variable speed control for the dilution fans.
For smaller cabinets, a flowmeter kit provides an economical alternative to the automated Dual Purge/NitroWatch controller. The flowmeter kit includes a plug-in power supply for the gas mixing fans, but does not include set-point capability or RH monitoring.
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, surface-mount devices (SMDs), hybrid packages
- Storage of printed circuit boards (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?
| Power Requirement | 24V: draws power from IsoDry Dual Purge System |
|---|---|
| Fans | 120 CFM each |
| 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 |
Automatic Relief/Bleed Valve
IsoDry Gas Dilution Module
Static-Dissipative PVC Plating
Ergonomic LiftLatches
Reinforced Doors with Non-adhesive Gaskets
Gas Dilution System Ensures Uniform Humidity
Three-Chamber IsoDry Desiccator Cabinet
Doors - The First Failure Point of a Desiccator Cabinet
Available Accessories
Popular Accessories
-
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. -
Humidity and Temperature Data Logger
Provides a convenient record of storage conditions inside a Desiccator chamber-adjustable logging interval (hours to months), USB port for easy data download in several formats. -
Dual Purge and NitroWatch
Terra’s Dual Purge and NitroWatch relative humidity controllers maintain a low-RH set-point inside a desiccator or glove box; they provide variable purge control that ensures continuous positive pressure and eliminates nitrogen waste. -
NitroWatch Relative Humidity Sensor
NitroWatch relative humidity sensor provides continuous moisture monitoring inside a desiccator or glove box. -
Jumbo Display Hygro-Thermometer
Digital temperature/humidity gauge is ideal for monitoring temperature and humidity. -
Microwaveable Kleer-Vue Sorbent Box
An alternative to nitrogen purging, these desiccant units contain indicating silica gel that turns from blue to pink as moisture is absorbed. -
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) -
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. -
Small Powder-Coated Steel Desiccator Stand, 4"H
Small 4"H powder-coated steel desiccator stand adjusts to fit cabinet snugly; optional casters simplify positioning and cleaning. Also available in stainless steel and 12" height.
Manuals & Resources
Manuals & Resources
Dual Purge™ System
- Cuts nitrogen waste, guards against oxidation
- Ensures a constant positive pressure inside desiccators and other enclosures to block contamination and moisture inflow
- Automatically activates high-flow purge when doors are opened to ensure fast, effective purge of particles and moisture
- Operates in tandem with NitroWatch® to maintain any desired sub-ambient moisture level (down to 0% RH)
- Guards against pressure damage to desiccator doors and seals
- Door switches are highly reliable—rated for over 10 million operations
Desiccators must be continuously purged with nitrogen or another process gas in order to ensure a controlled environment free of contaminants and moisture.
Unfortunately, however, a steady gas inflow can't guarantee the clean, dry conditions you require. A flow adequate to maintain a safe internal positive pressure when doors are closed is insufficient to overcome the backflow of outside air that occurs when a door is opened. A higher-level purge that might guard against this backflow wastes nitrogen and leads to over-pressurization that warp doors and damage seals.
Dual Purge System Offers Variable-Purge Security
The Desiccator Dual Purge System solves these problems by providing a higher flow level only when it's needed, and only for as long as it's needed.
It relies on a sensor switch installed on each door. During normal operation, with all doors closed, the system maintains an economical low flow of nitrogen into the desiccator to ensure a constant positive pressure of about 0.05" WG (Water Gauge)—just enough to block out moisture and contaminants.
When a door is opened, the sensor switch immediately activates a high-flow purge of nitrogen into the desiccator's plenum chamber that minimizes the influx of moisture and contaminants.
When the door is closed, the high-level gas flow continues to purge the desiccator for a selectable period of time, ensuring that any moisture that does enter the chamber is quickly forced out of the Automatic RB® (Relief/Bleed) Valve, before it can degrade sensitive materials. This time delay is adjustable, so you can retain the high-flow for a longer time when you suspect moisture contamination may have occurred. Note: The Automatic RB® Valve must be ordered separately.
The dual-purge capabilities of these units ensure that contaminants and moisture stay outside the processing chamber and at the same time guard against dangerous over-pressurization that can lead to warped doors, failed seals—even explosions! And because the Dual Purge System delivers only as much gas as is necessary, it economizes on nitrogen consumption; tests show that in many applications, these units can pay for themselves in a matter of months.
Safety Alarms Ensure Worry-Free Operation
The Dual Purge System incorporates a flowmeter, a line pressure gauge and a variable purge mechanism. A “Low-Pressure” alarm is activated if the incoming line pressure is ever interrupted. This dual audible/visible alarm alerts you to a disconnected supply line, an empty gas storage pod, or other problem that could spell disaster for contents of a desiccator or glove box!
NitroWatch™ Controller Expands Capabilities
The Dual Purge System operates in tandem with Terra's NitroWatch System to fully automate moisture control.
The NitroWatch includes a humidity sensor that continuously monitors the internal RH level and activates the Dual Purge to automatically maintain any sub-ambient humidity threshold you require (down to 0% RH). For more critical requirements, select the NitroPlex™, which combines this automatic humidity control with multiplexed purge capability. In all of these applications, the Automatic RB Valve is required to ensure safe relief of over-pressurization that can build inside a chamber.
- Dimensions: 12"W x 11.25"D x 7"H (305 mm x 286 mm x 178 mm)
- Weight: 16 lbs. (7258 g.)
- Flowmeter: 0-20 SCFH
- Line Pressure Gauge: 0-60 psi
- Chamber Sensor: 0 - 0.4" WG (factory set at 0.02" WG)
- Inlet/Outlet: 0.25" (6 mm) (accepts 0.25" (6 mm) OD polyethylene tubing)
- Case Material: 304 stainless steel; Chrome plated or stainless steel internal fittings
- Power Requirement: 110/220VAC, 50/60Hz (requires no manual power setting)
- Timer Adjustment: 0-8 minutes (factory set at 1 minute)
when Doors Closed
Moisture when a Door Opens
when Doors Closed and %RH Under Set Point
Moisture when Door Opened or %RH Under Set Point
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Mobile Desiccator Cabinet; 1 Chamber, Static Dissipative PVC, 23.75" W x 28.875" D x 60.25" H ID$5,451Usually Ships in 20 - 24 days
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