Select Product Options

Voltage Control Type Data Logging RH Accuracy Temperature Reading ISO Class Price Usually Ships in Stocked
12 V NitroWatch No +/- 2% RH No ISO 7 $1,384 1-3 Days Stocked
12 V Smart NitroWatch Humidity Sensor N/A +/- 1.5% RH Yes ISO 7 $880 5-9 Days
12 V Smart NitroWatch w/ Data Logging Yes +/- 1.5% RH Yes ISO 7 Request Quote 5-9 Days
120 V Dual Purge, High Flow No N/A No ISO 7 $5,485 1-3 Days Stocked
240 V Dual Purge, High Flow No N/A No ISO 7 $4,985 20-24 Days
NitroWatch Humidity Sensor N/A +/- 2% RH No ISO 7 $969 5-9 Days
$4,193 1-3 Days Stocked

Summary

  • Available ISO Ratings: ISO 7, ISO 8
  • Smart humidity controller provides automatic setpoint control and datalogging for glove box
  • 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 a pressure sensors to initiate high-flow if the chamber pressure falls below a user-specified value.
  • The "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 - just enough to block out moisture and contaminants.
  • The Dual Purge™ also displays internal pressure inside the glovebox, 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 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. For applications that require greater accuracy and control, Terra's DewWatch™ measures moisture volumes down to 0.5 PPM.

Features & 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.

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.

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.
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