EOGas 4: High efficiency tabletop EtO sterilization


EtO Sterilization

for the 21st Century

The temperature-controlled EOGas 4 cabinet along with Andersen's bag and cartridge technology maximizes gas efficiency and minimizes gas usage; only 17.6g of gas per cycle.


Our secret to

high efficiency


Unlike traditional Ethylene oxide sterilizers which involve rigid metal chambers and large external tanks of gas, the EOGas 4 system uses gas impermeable sterilization bags and unit dose 100% EtO cartridges.

By eliminating chamber dead space, EO-FCT employs only a tiny fraction of the EtO used in other systems.


Only 17.6g

of gas per load


No more 50lb tanks!

EOGas 4 provides an optimal use of gas thanks to its unique EO-FCT architecture.


EOGas 4 is gentler with the environment and with your pocket.


Easy installation


EOGas 4 requires minimal installation: just a 1" PVC hose to the outside with the wall plate provided. There are no water or vacuum lines required. Sterilization and aeration happen in the same cabinet.


The EOGas 4 is a 50°C or 30°C cycle, bench top cabinet with active aeration. 4 cycles are available, the fastest being just 3½ hours at 50°C, all delivering 10-6 SAL. Turn-around time for delicate medical items has never been this fast.

EOGas 4 compared to other low temperature sterilizers


  • The widest range of material and product compatibility (other than foods, liquids, or drugs).
  • Ability to sterilize long, narrow, and multi-channel lumens.
  • All sides and surfaces are sterilized; no “shadowing”
  • Compatible with all common packaging materials.
  • Will not damage delicate instruments like harsh chemical sterilants.


EOGas 4 sterilizer

Ethylene Oxide Flexible Chamber Technology:

The reliability of EtO using only 17.6 g/cycle




See how our exclusive EO-Flexible Chamber Technology.


EO-FCT uses active aeration to flush the sterilization bag with a constant flow of fresh air at the end of the sterilization cycle. Items that retain EtO may require additional aeration. With EOGas, sterilization and aeration occurs in the same chamber. There is no need to transfer products to a separate aeration area.

FDA & Validation Information


The flexible endoscopes are validated for the 3 hour cycle at 50°C in the EOGas 4 sterilizer.


Find the FDA clearance information here.

EO-FCT Sterilization vs Traditional EtO Sterilization


  • True 10-6, 12-log sterilization
  • Small tabletop footprint
  • Only 17.6g of EtO per load
  • Easy Installation and maintenance
  • Affordability
  • Operator training for the life of the sterilizer
  • Sterilization and aeration in the  same chamber.
  • No need to wait for a large chamber to get full


Using the EOGas 4 sterilizer

How EOGas 4 works

The sterilization bag and its components

        The key feature of EO-flexible chamber system is the sterilization bag. The bag is the sterilization chamber.  It keeps the use of gas at a minimum while ensuring the highest possible concentration.

       The loaded sterilization bag is connected to the gas management system. This will extract most of the air from the bag while the sterilant is released. The opposite will happen once sterilization has been achieved. This process ensures a high gas concentration while minimizing the use of gas.


       The load and the 17.6g EtO cartridge are placed in the sterilization bag. Standard sterility indicators (BIs) are used to ensure cycle success.





Step by step operation of EOGas 4

Resources for existing EOGas 4 users



EOGas 4 brochure





EOGas 4  Abator





These are the technical specifications of the EOGas Series 4 (AN-4000.11) sterilizer. Please contact us if you need more details.


External dimensions:

(L x H x D) 22 in x 28 in x 28.25 in


Internal dimensions:

(L x H x D) 19 in x 13.75 in x 23.25 in



3.6 cu ft


Cycle duration:

3.5 hours at 50 °C

12 hours at 30 °C



EOGas 4 Refill kit




The Series 4 refill kit comes with cartridges, liner bags, Humidichips and Dosimeters for 16 cycles. Each cartridge contains 17.6 g of EtO and the liner bag (sterilization chamber) holds up to 45 l. The series 4 sterilizer requires this kit and only this kit.




15 x sterilization bags

14 x EtO cartridges

14 x Humidichips

14 x Dosimeters


Number of cycles 14

Sterilization bag size 45 l

EtO quantity in cartridge 17.6 g


Frequently Asked Questions

  • 1. How long does it take to sterilize an endoscope?

    Endoscopes are sterilized in a 3.5 hour cycle.  The user must also follow manufacturer EtO aeration guidelines that could be up to an additional 12 hours of aeration.




  • 2. Do you need water or steam heat lines?

        No.  Our tabletop unit only needs a 1 inch port to the outside.

  • 3. Is it FDA cleared for human use?

     Yes. See FDA endoscope information above.

  • 4. How many endoscopes can be sterilized at a time?

    Depends on endoscope type and size.  Please see FDA validation information above.

  • 5. Is it difficult to install?

    No.  It is very easy and convenient to install and comes in a tabletop package.

  • 6. Is EtO corrosive on endoscopes?

    No.  EtO is the most gentle type of sterilization available.  Perfect for your most delicate instruments.

  • 7. Is training included in the price?

    Yes, we offer training free of charge for the life of the sterilizer

  • 8. Will EtO be banned?

    No.  EtO is used in many different household products and has a similar chemical ratings as other products such as hydrogen peroxide.

Andersen sterilizers are 100% US made. Proudly designed and manufactured at our headquarters in Haw River, North Carolina.

Andersen provides free training for as many operators as required, for the lifetime of any of its sterilizers.



We have the sterilizer that meets your needs!

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Contact Us


Tel: 800-523-1276




Andersen Products, Inc.

Health Science Park • 3202 Caroline Drive

Haw River, NC 27258-9564 USA




Copyright © 2020  Andersen Products, Inc.

International Offices











UK :

H.W. Andersen Products, Ltd.

Tel +44(0)1255 428 328


Web: www.anderseneurope.com


Latin America:

Tel +1(800) 523-1276




Tel +1(800) 523-1276




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EO-FCT Sterilization vs Traditional EtO Sterilization
  • True 10-6, 12-log sterilization

EO-FCT Sterilization vs Traditional EtO Sterilization

EO-FCT Sterilization vs

Traditional EtO Sterilization