An Eto Sterilizer short for Ethylene Oxide sterilizer is a specialized device or system that uses ethylene oxide (EO or EtO), a colorless, flammable gas, to sterilize medical devices, pharmaceuticals, and other heat- or moisture-sensitive products. This low-temperature gaseous process is one of the most widely used methods in healthcare for ensuring sterility without damaging delicate materials like plastics, electronics, or complex assemblies. It’s particularly valuable because it can penetrate packaging and reach hard-to-access areas, making it suitable for items like catheters, syringes, and surgical implants.
ETO Sterilizer Video
How Does EtO Sterilization Work?
The process typically involves three main phases, controlled by four key parameters: gas concentration, temperature, relative humidity, and exposure time. These factors ensure the EO gas diffuses into the product, reacts with microbial DNA, and destroys viable microorganisms.
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Pre-conditioning: Products are humidified and heated in a controlled environment to optimize gas penetration.
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Sterilization: The items are exposed to the EO gas mixture in a sealed chamber.
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Aeration: Residual EO is removed through heating and ventilation, as the gas is toxic and must be aerated out to safe levels.
Modern systems, like those from Andersen Sterilizers, use innovative “EO-Flexible Chamber Technology” (EO-FCT), which reduces EO usage by up to 90% by evacuating air from a flexible bag, minimizing environmental impact.
Key Advantages
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Broad Compatibility: Works with nearly all materials, including polymers, resins, and multi-component devices—unlike steam or radiation methods that can warp or degrade plastics.
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Penetration Power: Sterilizes packed or palletized items without unpacking, ideal for high-volume production.
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Low Temperature: Operates below 63°C, preserving device functionality.
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Proven Efficacy: Used to sterilize over 20 billion medical devices annually in the U.S., preventing healthcare-associated infections (HAIs).
Salient Features of Ethylene Oxide Sterilizer
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Machine is suitable to Sterilize Surgical Medical Device products like I.V. Sets, Disposable Syringes, Disposable Surgical Set, catheter, Urine Bag etc.
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ETO Sterilization reduce microbiological load and increase life span of material.
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Modular construction of chamber.
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Model is available from 0.5 Cubic Meters to 40 Cubic Metres.
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Easy to operate.
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Fully automatic operation based on PLC control.
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Semi Automatic (Pneumatically Operated Ball Valve) Control.
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Contact parts are SS 304 / 316.
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Process time about 8 hours.
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IQ/OQ/DQ documentation can be offered on demand. (OPTIONAL).
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It is useful for prevention of micro biological contamination useful for treatment of spices, dried nuts, Foods Packed cereals etc.
Process Operation of ETO Sterilizer
Ethylene Oxide Sterilization (Sterilisation) offers various distinct advantages over the conventional steam sterilizers (sterilisers), being a DRY & COLD (operates at 50ºC ) process proves very useful in sterilization of expensive items, also it has got a unique penetration ability, so it is very useful in sterilization (Sterilisation) of expensive and delicate items such as Cardiac catheters, Stents, IOL’s Tubings, various types of scopes, sharp surgical instruments etc., its unique mode of action, also enhances the life of several surgical accessories & disposables items thus making them perfectly reusable.
Types of EO Gas Sterilizers
We are one of the leading EO Gas Sterilizer manufacturer in India. We manufacture below two types of ETO sterilizers:
Semi Automatic Operation Mode EO Sterilizer: In this type of control mode there are analog type buttons onto control panel of the machine through which machine operation procedure will be done.
Fully Automatic Operation Mode EO Sterilizer: This is PLC HMI based fully automatic control mode equipment in which there is HMI mounted onto control panel of the machine through which operation procedure done.
Technical Specification of Ethylene Oxide Sterilizer
| Model | AETOS – 2.6 | AETOS – 4.5 | AETOS – 8 |
| Working Capacity in Cu. Ft. | 2.6 | 4.5 | 8 |
| Working Volume | 70 Liters | 125 Liters | 200 Liters |
| Chamber Size | 12” (W) x 12” (H) x 32”
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12” (W) x 12” (H) x 54” (D) OR
15” (W) x 15” (H) x 36” (D) |
20” (W) x 18” (H) x 38” (D) OR 16” (W) x 16” (H) x 54” (D) |
| Sterilant Gas | 40 grams cartridge | 100 grams cartridge | 170 grams cartridge |
| Sterilization Cycle | Warm & Cold Cycles are possible. | Warm & Cold Cycles are possible. | Warm & Cold Cycles are possible. |
| Aeration | In-built aeration facility provided. | In-built aeration facility provided. | In-built aeration facility provided. |
| Utility | Compressed Air (100 psig) | Compressed Air (100 psig) | Compressed Air (100 psig) |
| Power Supply | 1 K.W. | 2 K.W. | 2.5 K.W. |
| Power Voltage | 220 volts, Single Phase, 50 Hertz | 220 volts, Single Phase, 50 Hertz | 220 volts, Single Phase, 50 Hertz |
* Power voltage can be adjusted as per customer’s domestic power voltage requirements.
* Rights of technical improvements & modification reserved.
* Illustrations & dimensions are shown for information purpose only.
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