Ethylene Oxide Detection for Sterilisation and Process Safety

Alphasense ethylene oxide (EtO) sensors are designed for sterilisation, cold storage, and general industrial safety where accurate ppm-level EtO measurement is critical. Available in A- and B-Series formats with IST options, they offer flexible integration into portable and fixed detectors.

Sensor Product Overview

• Portable & Industrial Safety – A-Series EtO Sensors

• ETO-A1 – A-Series EtO sensor (ppm range) for portable gas detectors and fixed gas detection systems with +300 mV bias required

• Fixed & High-Humidity – B-Series EtO Sensors

• ETO-B1 – B-Series EtO sensor for fixed installations and high-humidity environments with +300 mV bias required.

• Digital “+” Integrated Smart Technology (IST) Variants

• ETO-A1-IST | ETO-B1-IST add on-sensor memory and temperature measurement for plug-and-play integration and simplified temperature compensation

Choosing the Right Sensor by Application

• Sterilisation and Medical Facilities

• ETO-A1 – Portable leak detection and area monitors in hospital sterilisation suites and medical device handling.

• Cold Storage & Food Processing

• ETO-A1 | ETO-B1 – Monitoring EtO used for fumigation and cold-chain sterilisation; A-Series for handheld survey instruments, B-Series for fixed monitors in high-humidity environments.

• Digital-First OEM Designs

• ETO-A1-IST | ETO-B1-IST – Simplify digital integration with stored calibration data and integrated temperature sensing.

Key Benefits Across the Sensor Portfolio

• A / B-Series coverage for both portable and fixed EtO systems.
• Bias-operated electrochemical design optimized for ppm-range EtO sensing in industrial safety, environmental air quality analysis and process control.
• IST “+” options reduce design complexity and support plug-and-play replacement in the field.

Why OEMs Choose Alphasense

• Shared electronics, AFEs and ISBs across EtO and other biased toxic sensors (NO, NH₃,VOC) streamline board designs.
• Established application know-how in sterilisation, environmental air quality, and industrial safety.
• Long-term product availability and consistent electrochemical platforms support regulatory qualification and fleet stability.

How Sensors Work

EtO sensors follow the same electrochemical amperometric mechanism used across the Alphasense toxic portfolio, with a biased working electrode tuned for EtO oxidation. The resulting current is proportional to EtO concentration, and instrument electronics or IST boards handle temperature compensation, calibration data and signal conditioning.

Why Measure Ethylene Oxide Gas

Ethylene oxide is widely used for sterilising medical devices, treating food products and in chemical manufacture. It is flammable and toxic, with strict exposure limits and regulatory controls. Continuous EtO monitoring helps:

• Maintain worker safety in sterilisation suites, warehouses and production areas.
• Demonstrate compliance with occupational exposure and environmental emission requirements.