Andersen Sterilizers has launched EOGas 4PLUS, a low-emission ethylene oxide (EO) system designed to support sterile processing departments as part of their infection control strategies.

Building on the success of its predecessor, EOGas 4PLUS features Andersen’s award-winning EO-Flexible Chamber technology, three- and six-hour cycles, advanced cycle control, and enhanced user interface—while maintaining safety and environmental standards. The system is cleared by the U.S. Food and Drug Administration is reportedly the only existing method proven to sterilize the longest lumens (≤3530mm working lumen length endoscopes).

“EOGas 4PLUS is a direct response to customer feedback,” Andersen Sterilizers CEO William Andersen, M.D., said. “We listened; we acted. As hospitals and clinics continue to report on possible hospital-acquired infections due to improperly decontaminated endoscopes, we aimed to deliver a system that could not only sterilize everyday medical devices but also long, difficult-to-sterilize endoscopes. EOGas 4PLUS is the only system in the U.S. [that is] FDA-cleared to terminally sterilize the longest endoscopes currently on the market. We are delivering a system that raises the bar for EO sterilization.”

Key Features of EOGas 4PLUS include:

• EO-Flexible Chamber technology, which removes excess air from the chamber, thus greatly reducing the amount of EO needed for terminal sterilization (10-6 SAL)
• Low dose EO (17.6 grams per cycle, the equivalent of 1.5 tablespoons)
• Low temperature sterilization
• Sterilization and aeration in the same chamber
• FDA-cleared to sterilize complex, long, narrow lumens
• Low emissions—zero (99.9% abatement) emissions when paired with an abator
• Free operator training for the life of the sterilizer
• EOGas 4PLUS is engineered and manufactured in North Carolina.

The launch of EOGas 4PLUS marks a significant milestone for Andersen as it continues to push innovation in low-temperature sterilization—an increasingly critical need in today’s healthcare and life sciences environments, where delicate instruments require gentle yet effective sterilization solutions.

Established more than 60 years ago by medical practitioners, Andersen Sterilizers provides in-house Ethylene Oxide-Flexible Chamber Technology (EO-FCT) sterilization in the U.S. and globally. For decades, Andersen has focused on designing and manufacturing low-temperature sterilization solutions for healthcare, veterinary, research, and manufacturing markets. Andersen’s sterilizers are lethal on pathogens yet gentle on expensive medical devices, preserving them for ongoing use.