Smart humidity controller provides automatic setpoint control and datalogging for desiccator cabinet
Nitrogen purge control maintains user-speciffied sub-ambient RH set-point down to 0% ±1.5% RH
Variable-purge system uses high/low flow settings to conserve nitrogen
High-flow also activates when doors are opened for fast, effective purge of particles and moisture
Programmable logic gives user complete control over warning alarms and other system functions
Terra Universal's IsoDry® Dual Purge™ and NitroWatch™ work together to fully automate moisture control inside a desiccator, glove box, or similar enclosure.
How Dual Purge™ Works:
The Dual Purge™ is a variable gas-purge system that switches between "high-flow" and "low-flow" to efficiently and effectively remove particles/moisture in the enclosure.
Without NitroWatch™, the Dual Purge™ does not sense or display RH%. It uses magnetic door sensors to initiate high-flow.
When a door is opened, "high-flow" activates for a user-specified interval before switching back to an adjustable "low-flow" setting to conserve nitrogen gas.
During normal operation, with all doors closed, the system maintains an economical "low-flow" of nitrogen to ensure a constant positive pressure of about 0.05" WG (Water Gauge)—just enough to block out moisture and contaminants.
The Dual Purge™ can also display internal pressure inside the desiccator cabinet, and includes an alarm that activates if the incoming gas line pressure is ever interrupted (for instance if the supply from a nitrogen cylinder is depleted).
How NitroWatch™ Works:
NitroWatch™ upgrades your Dual Purge™, working in tandem to precisely and automatically control the flow of nitrogen and maintains a preset humidity level (from ambient to 0% ± 1.5% RH), no matter how operating conditions may change.
The NitroWatch™ module requires connection to the Dual Purge™, plus a humidity sensor which is mounted inside the enclosure.
When a door is opened, or when the RH climbs above set-point level, NitroWatch™ triggers Dual Purge™ to activate high-flow to accelerate moisture removal.
When the RH set-point is reached, NitroWatch™ triggers Dual Purge™ to revert from high-flow to low-flow nitrogen gas supply to maintain the set-point and conserve nitrogen.
The NitroWatch™ is available in 2 configurations:
Smart® NitroWatch™ includes temperature sensing and built-in data logging (.CSV file downloadable to a USB flash drive, no software required).
Standard NitroWatch™ does not include temperature sensing or data logging.
Application Note: The NitroWatch™ sensor provides an exact %RH reading in one chamber only. If multiple RB valves are installed and doors are frequently opened, this reading may not be representative of all chambers. For precise chamber-by-chamber monitoring and control, select Terra's NitroPlex™ system.
Specifications
• Available ISO Ratings: ISO 7, ISO 8
• ISO Class: ISO 7
• Unit of Measure: of 0
Helena
Features and Benefits
Products Compliant With Your ISO Rating
Provide Terra with your desired ISO rating. We will tailor the product to meet your rating and supply a certificate of compliance appended to your invoice, to be included in your compliance package. All certificates are archived in Terra's system for quick retrieval.
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.
Dual Purge™ System Diagram
The Dual Purge™ is a variable gas-purge system that switches between "high-flow" and "low-flow" to efficiently and effectively remove and block out moisture and contaminants. Without NitroWatch™, Dual Purge™ does not sense or display RH%. It uses magnetic door sensors to initiate high-flow. When a door is opened or when pressure drops, high-flow activates for a user-specified interval before switching back to an adjustable low-flow setting to conserve nitrogen. With all doors closed, the system maintains an economical "low-flow" to maintain constant positive pressure.
Dual Purge™ and Nitrowatch™ System Diagram
The NitroWatch module connects to a humidity sensor inside the desiccator cabinet and activates the Dual Purge to automatically maintain sub-ambient RH down to 0% RH. When the RH set-point is reached, the system reverts from high-flow to low-flow nitrogen gas to maintain the set-point and conserve nitrogen. When a door is opened, or when the RH climbs above set-point, the system re-activates high-flow to accelerate moisture removal.
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.
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.
