Analytical Industries Inc., a DwyerOmega brand, designs and manufactures high-quality electrochemical oxygen sensors and gas analyzers. These state-of-the-art instruments support industrial process control and provide reliable breathing-air monitoring for both diving and medical applications.

From our humble beginnings in a California garage, with nothing more than a sheet of paper and a vision, Analytical Industries Inc. (AII) has evolved into a market leader in high-performance sensors and analyzers for the most demanding applications.

In those early days, we perfected our own electrochemical oxygen sensor and used that foundation to design and build industry-leading trace and high-purity O2 analyzers. Today, as a DwyerOmega brand, we continue to push the boundaries of innovation, always starting with our customers’ needs and engineering every new product around their most critical challenges.

For over 30 years, we’ve specialized in designing and producing high-performance oxygen sensors and gas analyzers that serve a broad spectrum of applications, from industrial process control and specialty-gas purity to breathing-air quality in diving and medical devices.

Our History

Founded in 1990, AII began as a small team of engineers dedicated to pushing the boundaries of oxygen-sensor technology. Over three decades, we’ve grown into a global supplier, yet our commitment to “Made in USA” craftsmanship and customer-first innovation remains at the heart of everything we do.

What We Do

Quality is built into the heart of every product we make. From the selection of high-grade components to stringent in-house testing protocols, we engineer each instrument for unwavering accuracy, repeatability, and a long operational life. You can trust our analyzers and sensors to maintain peak performance day after day, even in the most challenging environments.

Whether you’re evaluating a new product or seeking ongoing support, you’ll find our team ready to listen, advise, and deliver solutions you can count on.

Quality and Compliance

Our facility is certified to ISO 9001 and ISO 13485 standards, with many products FDA-approved and MDSAP-compliant. We adhere to stringent calibration, traceability and documentation processes to guarantee each instrument meets or exceeds industry requirements.

AII1 Analytical - Model PSR-11-917-MH1 - Replacement Sensor - Brochure