Experience Unmatched Efficiency
EOGas 4
Andersen’s EOGas 4® sterilizer is the only FDA 510(k) cleared system for terminal sterilization. With four cycles and active aeration, it offers the fastest processing time of just 3.5 hours.

Best for Veterinary
EOGas 4
The Smarter, Safer Way to Sterilize Delicate Medical Devices
EOGas 4 delivers FDA-approved terminal sterilization in just 3.5 hours with 90% less EO than competitors. EOGas 4 has unmatched compatibility, zero-emission options, and built-in safety features —
all in a compact unit that’s easy to install, operate, and maintain.
Image Gallery
Explore the EOGas 4 in Action
Accessories
Accessories Designed to Work Seamlessly with EOGas 4
Documents
User Manuals, Guides and Technical Documents for EOGas 4
EOGas 4 Brochure
Installation Instructions
EOGas 4 Zero Emissions Math
English
EO Safety Data Sheet – EO SDS
Smart Start Guide
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EO Fact Sheet
Compare All Andersen Sterilizer Models
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Health Canada License EOGas 4
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Health Canada License AN1004
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Health Canada License AN1004
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510(K) EOGas 4 Three Hour
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510(K) EOGas 4 Three Hour
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IFU EO Gas Cartridges
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SPECS – Exterior Dimensions. See brochure for interior dimensions.


Best for Veterinary
Free Lifetime Key Operator
Training for All Operators
Andersen provides free operator training for the lifetime of any of its sterilizers.
Videos
Coming soon.
Revolutionary EO Cartridge
The 17.6g EO cartridge delivers terminal sterility using 90% less EO than any other system on the market.
Unmatched compatibility
While autoclaves and other modalities are ideal for fast, high-temperature sterilization, the EOGas 4 takes care of the rest — expanding your clinic’s capabilities.
Controlled Environment
Warm air circulates throughout the chamber walls to maintain a constant temperature – ensuring effective sterilization and aeration.
Process Challenge Device
Built into the purge probe handle to ensure the 10-6 biological indicator is consistently placed in the most difficult location for EO to reach in every cycle – providing data driven results, regardless of the operator.
Active Aeration in Same Chamber
Andersen’s purge probe continuously flushes fresh air achieving active aeration within the sterilizer, eliminating the need for item transfer and ensuring safe off-gassing until removal.
Shelf Life
The FDA has cleared EOGas 4 sterilization loads wrapped with Sterisheet® or Tyvek® Sterilization Pouches with Chevron Seal for a shelf life of at least three months.
Efficient 3.5-Hour Cycle
Achieves the FDA-required 10-6 sterility assurance level for terminal sterilization of medical devices in just 3.5 hours.
Easy Installation Process
Requires only a 120v or 230v outlet and a 1″ dedicated exhaust line.
Free Operator Training
It’s like having a sterilization expert on staff! Free operator training for the life of your sterilizer and free 24/7 support.

Make your System Zero Emissions
The Andersen AN5100 abator is a simple, system designed to remove more than 99% of the EO from the exhaust of the EOGas4 sterilizer. The replaceable cartridge employs a dry catalyst resin that converts ethylene oxide to biodegradable organic compounds. Spent cartridges are non-hazardous.
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Why Ethylene Oxide?
There are many benefits to ethylene oxide sterilization, some of which may be crucial to your hospital or clinic, especially when reprocessing complex multi-channel endoscopes and delicate medical devices. Andersen’s FDA-cleared sterilizers offer several advantages, including low per-cycle cost, low-temperature operation and EO-Flexible Chamber Technology, which allows our systems to use a microdose of EO — just 17.6 grams per cycle. Our systems are able to achieve terminal sterilization (10-6 SAL) with 90% less EO than our competitors — this is ethylene oxide sterilization reimagined.

Experience the Future of Fast and Efficient Sterilization with EOGas 4

Unmatched Speed and Efficiency
Achieve sterilization in just 3.5 hours, including aeration, for delicate medical items.

Eco-Friendly and Cost-Effective
Utilize only 17.6g of EO gas, reducing usage by 90% compared to competitors.

Versatile Applications for All Needs
Perfect for instruments, electronics, fabrics, and more—ensuring effective sterilization across various materials.

User-Friendly
Interface
Our intuitive design allows you to set it and forget it, with lifetime training included.
Customer Testimonials
Our experience with Andersen has been outstanding.
FAQs
Find answers to your most pressing questions about the EOGas 4 PLUS sterilization system.
Expert Guidance for Your Needs
Tell us about your sterilization requirements — our experts are here to guide you to the perfect EO solution.