A Cath Lab Ethylene Oxide Gas Sterilizer (also known as ETO Sterilizer) is a specialized medical-grade system designed for safe, low-temperature sterilization of highly sensitive instruments used in cardiac catheterization laboratories. Unlike high-heat steam autoclaves, this technology employs ethylene oxide (ETO/EO) gas — a powerful, colorless alkylating agent — to penetrate complex devices and eliminate bacteria, viruses, fungi, and resistant spores without compromising delicate materials.
Operating at low temperatures (typically 30–60°C), ETO sterilization is the preferred method for heat- and moisture-sensitive equipment that cannot withstand traditional autoclaving. This makes it indispensable in modern Cath Labs where precision instruments are critical for life-saving procedures.
The sterilization cycle follows a general sequence, though exact timings and gas concentrations can vary widely depending on the load and requirements. The outline below is provided only as a typical reference.
The unit operates with disposable EO cartridges available in 40 g, 100 g, and 170 g sizes. It features a single-door chamber equipped with a straightforward locking mechanism. An electronic heating system maintains a consistent chamber temperature of 50 °C. Built for long-term reliability, the machine incorporates a suitably sized venturi housed within a sturdy cabinet. Dedicated control switches manage heating, gas injection, and power supply.
Preconditioning – Warm Humid Exposure Items are held in a controlled warm and humid atmosphere for approximately 12 hours. Conditions of about 70 % relative humidity and 55 °C are maintained to achieve uniform temperature and moisture throughout the load.
Gas Injection and Exposure A vacuum is drawn, after which EO gas is introduced into the chamber. The load remains under these conditions (same temperature and humidity) for roughly 4 to 8 hours.
Gas Removal and Aeration Vacuum is repeatedly applied while fresh air is admitted to purge residual EO from the chamber. This flushing and aeration phase typically continues for 8 to 12 hours until the sterilant is fully cleared.
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”
| 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.
It is suitable for disposable syringes, IV sets, single-use surgical kits, gloves, infusion sets, urine collection bags, contraceptive devices, and other medical products—especially those with complex geometries, sealed packaging, or long narrow lumens common in interventional tools.
A general cycle includes:
Models include AETOS-2.6 (2.6 cu. ft. / 70 L, 40 g cartridge), AETOS-4.5 (4.5 cu. ft. / 125 L, 100 g cartridge), and AETOS-8 (8 cu. ft. / 200 L, 170 g cartridge). All support warm and cold cycles with built-in aeration.
Power ranges from 1 kW to 2.5 kW depending on model, typically 220 V single-phase 50 Hz (adjustable to local voltage). It requires compressed air at 100 psig.
It features in-built aeration, repeated vacuum/air washes, and an exhaust/abatement system (scrubbers or similar) to remove residual ethylene oxide. This protects operators and meets environmental compliance.
Product-contact surfaces are Stainless Steel 304 and 316. The chamber has a modular design. Installation Qualification (IQ), Operational Qualification (OQ), and Design Qualification (DQ) documents are available on request.
It safely handles plastics, rubbers, electronics, and heat-labile polymers; penetrates sealed packages and narrow lumens; destroys resistant microorganisms (bacteria, viruses, fungi, spores); and complies with standards such as ISO 11135, FDA guidelines, and AAMI recommendations.
Core components include the pressure/vacuum-rated sterilization chamber, vacuum system, heating/temperature control, humidification system, EO gas delivery (cartridges or cylinders), recirculation, nitrogen/air inbleed, exhaust/abatement, control/monitoring (PLC/HMI with sensors), and aeration features.
Beyond Cath Labs and hospitals, it serves pharmaceutical, nutraceutical, herbal, Ayurvedic, biotech, cosmetic, and chemical industries, as well as medical device manufacturing for heat- and moisture-sensitive products.
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Connect with our engineering team to discuss your specific production requirements. We provide customized, cGMP-compliant machinery solutions designed to optimize your manufacturing facility and maximize output.
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Connect with our engineering team to discuss your specific production requirements. We provide customized, cGMP-compliant machinery solutions designed to optimize your manufacturing facility and maximize output.
Adinath International manufactures high-precision vial powder filling machines and complete packaging lines, providing reliable, hygienic, and efficient solutions for global pharmaceutical industries.
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