Qualitrol STB-100-1/ 100-2 Offshore Xtreme™ Smart Transformer Breather

Designed for Tropical and Saline Saturated Environments

Harsh marine climates require transformer accessories designed and engineered to handle these extreme environments. Qualitrols line of Offshore Xtreme™ instruments tackle these temperature extremes to ensure performance even in the harsh saline environment. They continue to carry the 5 year Qualitrol product warranty.


  • Reduce maintenance costs with learned transformer breathing patterns and self-regenerating desiccant
  • 316 stainless steel body components
  • Fiberglass circuit board enclosures and glass tubes
  • Color changing silica gel desiccant allows for a visual confirmation of breather regeneration
  • Multiple communication options including 4-20 mA, RS-485 MODBUS and local USB port provide for a variety of monitoring solutions for any application
  • Front mounted indication LED lights of green, amber, and red indicate breather status and alarm capabilities
  • Oil desiccant size of 30,000 liters/8,000 gallons


  • Multiple mounting options available for new or retrofit installation
  • Includes a solenoid valve that closes during the regeneration process to ensure moisture is not wicked into the transformer accidentally

Group Created with Sketch. Applications

The Qualitrol Offshore Xtreme™ Smart Transformer Breather removes moisture from air entering oil-filled transformers or LTC conservators. The PE breathers regenerate and operate in the same manner as the standard line of breathers offered by Qualitrol, but offer additional protection in a saline environment. Offshore breathers are engineered with advanced material sets to withstand the additional environmental constraints, including stainless steel, reinforced fiberglass and glass components.

Compare to Similar Products


Traditional Breather in the Marketplace

Utilizes silica gel to dry atmospheric air as the transformer breathes

Low initial cost of ownership but associated maintenance costs outweigh this over time

No alarming capability or failure detection available, must rely on human interaction maintain and service the breather

Desiccant disposal costs may apply if silica gel containing cobalt is used

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Other Smart Breathers in the Marketplace

Do not utilize color changing desiccants (Color changing silica gels allow the user to have a secondary visual indication of regeneration)

Some do not utilize a pressure sensor and solenoid valve technology to detect breathing shifts in the transformer ( This prevents liquid water from being drawn into the transformer accidentally)

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Qualitrol STB-100-1/ 100-2 Offshore Xtreme™ Smart Transformer Breather

No need for unnecessary maintenance or replacing silica gel in the field

Allow alarming and failure detection capability; there is no need to rely on human interaction

Utilizes a color changing silica gel as a secondary indication that regeneration took place giving peace of mind

Utilizes a pressure sensor and solenoid to detect inhale and exhale phases of the transformer and to prevent excess moisture from being drawn into the transformer

316 stainless steel body components

Fiberglass circuit board enclosures and glass tubing

Learn More
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